doc-rst: linux_tv: supress lots of warnings

The c language parser checks if there are duplicated object
definitions. That causes lots of warnings like:
	WARNING: duplicate C object description of ioctl

Let's remove those by telling Sphinx that the language for
those objects are c++. The look of the descriptions will
be close, and the warnings will be gone.

Please notice that we had to keep a few of them as C, as
the c++ parser seems to be broken when it finds an enum.

Yet, this reduced from 219 warnings to 143, with is
a good thing.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/linux_tv/media/dvb/fe-diseqc-recv-slave-reply.rst

@@ -14,7 +14,7 @@ Receives reply from a DiSEqC 2.0 command
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dvb_diseqc_slave_reply *argp )
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_diseqc_slave_reply *argp )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-diseqc-reset-overload.rst

@@ -15,7 +15,7 @@ to power overload.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, NULL )
+.. cpp:function:: int ioctl( int fd, int request, NULL )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-diseqc-send-master-cmd.rst

@@ -14,7 +14,7 @@ Sends a DiSEqC command
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dvb_diseqc_master_cmd *argp )
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_diseqc_master_cmd *argp )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-enable-high-lnb-voltage.rst

@@ -15,7 +15,7 @@ voltages.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, unsigned int high )
+.. cpp:function:: int ioctl( int fd, int request, unsigned int high )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-get-info.rst

@@ -15,7 +15,7 @@ front-end. This call only requires read-only access to the device
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dvb_frontend_info *argp )
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_frontend_info *argp )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-get-property.rst

@@ -16,7 +16,7 @@ FE_GET_PROPERTY returns one or more frontend properties.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dtv_properties *argp )
+.. cpp:function:: int ioctl( int fd, int request, struct dtv_properties *argp )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-read-status.rst

@@ -15,7 +15,7 @@ read-only access to the device
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, unsigned int *status )
+.. cpp:function:: int ioctl( int fd, int request, unsigned int *status )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/fe-set-frontend-tune-mode.rst

@@ -14,7 +14,7 @@ Allow setting tuner mode flags to the frontend.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, unsigned int flags )
+.. cpp:function:: int ioctl( int fd, int request, unsigned int flags )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/frontend_f_close.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <unistd.h>
 
 
-.. c:function:: int close( int fd )
+.. cpp:function:: int close( int fd )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/frontend_f_open.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <fcntl.h>
 
 
-.. c:function:: int open( const char *device_name, int flags )
+.. cpp:function:: int open( const char *device_name, int flags )
 
 Arguments
 =========

Documentation/linux_tv/media/dvb/net.rst

@@ -46,7 +46,7 @@ Creates a new network interface for a given Packet ID.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
 
 Arguments
 =========
@@ -135,7 +135,7 @@ Removes a network interface.
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, int ifnum )
+.. cpp:function:: int ioctl( int fd, int request, int ifnum )
 
 Arguments
 =========
@@ -178,7 +178,7 @@ Read the configuration data of an interface created via
 Synopsis
 ========
 
-.. c:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
+.. cpp:function:: int ioctl( int fd, int request, struct dvb_net_if *net_if )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-close.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <unistd.h>
 
 
-.. c:function:: int close( int fd )
+.. cpp:function:: int close( int fd )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-ioctl.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <sys/ioctl.h>
 
 
-.. c:function:: int ioctl( int fd, int request, void *argp )
+.. cpp:function:: int ioctl( int fd, int request, void *argp )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-mmap.rst

@@ -20,7 +20,7 @@ Synopsis
     #include <sys/mman.h>
 
 
-.. c:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset )
+.. cpp:function:: void *mmap( void *start, size_t length, int prot, int flags, int fd, off_t offset )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-munmap.rst

@@ -20,7 +20,7 @@ Synopsis
     #include <sys/mman.h>
 
 
-.. c:function:: int munmap( void *start, size_t length )
+.. cpp:function:: int munmap( void *start, size_t length )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-open.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <fcntl.h>
 
 
-.. c:function:: int open( const char *device_name, int flags )
+.. cpp:function:: int open( const char *device_name, int flags )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-poll.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <sys/poll.h>
 
 
-.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
+.. cpp:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
 
 Description
 ===========

Documentation/linux_tv/media/v4l/func-read.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <unistd.h>
 
 
-.. c:function:: ssize_t read( int fd, void *buf, size_t count )
+.. cpp:function:: ssize_t read( int fd, void *buf, size_t count )
 
 Arguments
 =========

Documentation/linux_tv/media/v4l/func-select.rst

@@ -21,7 +21,7 @@ Synopsis
     #include <unistd.h>
 
 
-.. c:function:: int select( int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout )
+.. cpp:function:: int select( int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout )
 
 Description
 ===========

Documentation/linux_tv/media/v4l/func-write.rst

@@ -19,7 +19,7 @@ Synopsis
     #include <unistd.h>
 
 
-.. c:function:: ssize_t write( int fd, void *buf, size_t count )
+.. cpp:function:: ssize_t write( int fd, void *buf, size_t count )
 
 Arguments
 =========