Documentation: move driver-api/isapnp to userspace-api/

driver-api/isapnp documents /proc interfaces for interfacing directly
with ISA Plug & Play devices, not any kind of API for kernel developers,
and should thus also live under userspace-api/.

Also fix a few issues while we're at it.

Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20231221124816.2978000-2-vegard.nossum@oracle.com

Documentation/driver-api/index.rst

@@ -81,7 +81,6 @@ available subsections can be seen below.
    dcdbas
    eisa
    isa
-   isapnp
    io-mapping
    io_ordering
    generic-counter

Documentation/userspace-api/index.rst

@@ -31,6 +31,7 @@ place where this information is gathered.
    vduse
    futex2
    tee
+   isapnp
 
 .. only::  subproject and html
 

Documentation/driver-api/isapnp.rst → Documentation/userspace-api/isapnp.rst

-==========================================================
-ISA Plug & Play support by Jaroslav Kysela <perex@suse.cz>
-==========================================================
+=======================
+ISA Plug & Play support
+=======================
 
 Interface /proc/isapnp
 ======================
 
-The interface has been removed. See pnp.txt for more details.
+The interface was removed in kernel 2.5.53. See pnp.rst for more details.
 
 Interface /proc/bus/isapnp
 ==========================

MAINTAINERS

@@ -11252,7 +11252,7 @@ F:	drivers/media/radio/radio-isa*
 ISAPNP
 M:	Jaroslav Kysela <perex@perex.cz>
 S:	Maintained
-F:	Documentation/driver-api/isapnp.rst
+F:	Documentation/userspace-api/isapnp.rst
 F:	drivers/pnp/isapnp/
 F:	include/linux/isapnp.h
 

drivers/pnp/isapnp/Kconfig

@@ -7,6 +7,6 @@ config ISAPNP
 	depends on ISA || COMPILE_TEST
 	help
 	  Say Y here if you would like support for ISA Plug and Play devices.
-	  Some information is in <file:Documentation/driver-api/isapnp.rst>.
+	  Some information is in <file:Documentation/userspace-api/isapnp.rst>.
 
 	  If unsure, say Y.