docs: admin-guide: add a series of orphaned documents

There are lots of documents that belong to the admin-guide but
are on random places (most under Documentation root dir).

Move them to the admin guide.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Documentation/ABI/stable/sysfs-devices-node

@@ -61,7 +61,7 @@ Date:		October 2002
 Contact:	Linux Memory Management list <linux-mm@kvack.org>
 Description:
 		The node's hit/miss statistics, in units of pages.
-		See Documentation/numastat.txt
+		See Documentation/admin-guide/numastat.rst
 
 What:		/sys/devices/system/node/nodeX/distance
 Date:		October 2002

Documentation/ABI/testing/procfs-diskstats

@@ -29,4 +29,4 @@ Description:
 		17 - sectors discarded
 		18 - time spent discarding
 
-		For more details refer to Documentation/iostats.txt
+		For more details refer to Documentation/admin-guide/iostats.rst

Documentation/ABI/testing/sysfs-block

@@ -15,7 +15,7 @@ Description:
 		 9 - I/Os currently in progress
 		10 - time spent doing I/Os (ms)
 		11 - weighted time spent doing I/Os (ms)
-		For more details refer Documentation/iostats.txt
+		For more details refer Documentation/admin-guide/iostats.rst
 
 
 What:		/sys/block/<disk>/<part>/stat

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -34,7 +34,7 @@ Description:	CPU topology files that describe kernel limits related to
 		present: cpus that have been identified as being present in
 		the system.
 
-		See Documentation/cputopology.txt for more information.
+		See Documentation/admin-guide/cputopology.rst for more information.
 
 
 What:		/sys/devices/system/cpu/probe
@@ -103,7 +103,7 @@ Description:	CPU topology files that describe a logical CPU's relationship
 		thread_siblings_list: human-readable list of cpu#'s hardware
 		threads within the same core as cpu#
 
-		See Documentation/cputopology.txt for more information.
+		See Documentation/admin-guide/cputopology.rst for more information.
 
 
 What:		/sys/devices/system/cpu/cpuidle/current_driver

Documentation/admin-guide/device-mapper/statistics.rst

@@ -13,7 +13,7 @@ the range specified.
 
 The I/O statistics counters for each step-sized area of a region are
 in the same format as `/sys/block/*/stat` or `/proc/diskstats` (see:
-Documentation/iostats.txt).  But two extra counters (12 and 13) are
+Documentation/admin-guide/iostats.rst).  But two extra counters (12 and 13) are
 provided: total time spent reading and writing.  When the histogram
 argument is used, the 14th parameter is reported that represents the
 histogram of latencies.  All these counters may be accessed by sending
@@ -151,7 +151,7 @@ Messages
 	  The first 11 counters have the same meaning as
 	  `/sys/block/*/stat or /proc/diskstats`.
 
-	  Please refer to Documentation/iostats.txt for details.
+	  Please refer to Documentation/admin-guide/iostats.rst for details.
 
 	  1. the number of reads completed
 	  2. the number of reads merged

Documentation/admin-guide/hw-vuln/l1tf.rst

@@ -241,7 +241,7 @@ Guest mitigation mechanisms
    For further information about confining guests to a single or to a group
    of cores consult the cpusets documentation:
 
-   https://www.kernel.org/doc/Documentation/cgroup-v1/cpusets.rst
+   https://www.kernel.org/doc/Documentation/admin-guide/cgroup-v1/cpusets.rst
 
 .. _interrupt_isolation:
 

Documentation/admin-guide/index.rst

@@ -85,8 +85,25 @@ configure specific aspects of kernel behavior to your liking.
    perf-security
    acpi/index
    aoe/index
+   btmrvl
+   clearing-warn-once
+   cpu-load
+   cputopology
    device-mapper/index
+   efi-stub
+   highuid
+   hw_random
+   iostats
+   kernel-per-CPU-kthreads
    laptops/index
+   lcd-panel-cgram
+   ldm
+   lockup-watchdogs
+   numastat
+   pnp
+   rtc
+   svga
+   video-output
 
 .. only::  subproject and html
 

Documentation/admin-guide/kernel-parameters.txt

@@ -5066,7 +5066,7 @@
 
 	vga=		[BOOT,X86-32] Select a particular video mode
 			See Documentation/x86/boot.rst and
-			Documentation/svga.txt.
+			Documentation/admin-guide/svga.rst.
 			Use vga=ask for menu.
 			This is actually a boot loader parameter; the value is
 			passed to the kernel using a special protocol.

Documentation/admin-guide/lcd-panel-cgram.rst

@@ -1,5 +1,3 @@
-:orphan:
-
 ======================================
 Parallel port LCD/Keypad Panel support
 ======================================