[media] move cx25821 out of staging

This driver had the major issues already fixed. Move it out
of staging.

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/Kconfig

@@ -736,6 +736,8 @@ source "drivers/media/video/cx88/Kconfig"
 
 source "drivers/media/video/cx23885/Kconfig"
 
+source "drivers/media/video/cx25821/Kconfig"
+
 source "drivers/media/video/au0828/Kconfig"
 
 source "drivers/media/video/ivtv/Kconfig"

drivers/media/video/Makefile

@@ -104,6 +104,7 @@ obj-$(CONFIG_VIDEO_CX88) += cx88/
 obj-$(CONFIG_VIDEO_EM28XX) += em28xx/
 obj-$(CONFIG_VIDEO_TLG2300) += tlg2300/
 obj-$(CONFIG_VIDEO_CX231XX) += cx231xx/
+obj-$(CONFIG_VIDEO_CX25821) += cx25821/
 obj-$(CONFIG_VIDEO_USBVISION) += usbvision/
 obj-$(CONFIG_VIDEO_PVRUSB2) += pvrusb2/
 obj-$(CONFIG_VIDEO_CPIA2) += cpia2/