docs: driver-api: add a series of orphaned documents

There are lots of documents under Documentation/*.txt and a few other
orphan documents elsehwere that belong to the driver-API book.

Move them to their right place.

Reviewed-by: Cornelia Huck <cohuck@redhat.com> # vfio-related parts
Acked-by: Logan Gunthorpe <logang@deltatee.com> # switchtec
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Documentation/admin-guide/laptops/thinkpad-acpi.rst

@@ -643,7 +643,7 @@ Sysfs notes
 	2010.
 
 	rfkill controller switch "tpacpi_bluetooth_sw": refer to
-	Documentation/rfkill.txt for details.
+	Documentation/driver-api/rfkill.rst for details.
 
 
 Video output control -- /proc/acpi/ibm/video
@@ -1406,7 +1406,7 @@ Sysfs notes
 	2010.
 
 	rfkill controller switch "tpacpi_wwan_sw": refer to
-	Documentation/rfkill.txt for details.
+	Documentation/driver-api/rfkill.rst for details.
 
 
 EXPERIMENTAL: UWB
@@ -1426,7 +1426,7 @@ Sysfs notes
 ^^^^^^^^^^^
 
 	rfkill controller switch "tpacpi_uwb_sw": refer to
-	Documentation/rfkill.txt for details.
+	Documentation/driver-api/rfkill.rst for details.
 
 Adaptive keyboard
 -----------------