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>

drivers/gpu/drm/Kconfig

@@ -141,7 +141,7 @@ config DRM_LOAD_EDID_FIRMWARE
 	  monitor are unable to provide appropriate EDID data. Since this
 	  feature is provided as a workaround for broken hardware, the
 	  default case is N. Details and instructions how to build your own
-	  EDID data are given in Documentation/EDID/howto.rst.
+	  EDID data are given in Documentation/driver-api/edid.rst.
 
 config DRM_DP_CEC
 	bool "Enable DisplayPort CEC-Tunneling-over-AUX HDMI support"