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 <[email protected]> # vfio-related parts
Acked-by: Logan Gunthorpe <[email protected]> # switchtec
Signed-off-by: Mauro Carvalho Chehab <[email protected]>