Convert plain text documentation to reStructuredText format and add it to
Sphinx TOC tree.  No essential content change.
Signed-off-by: NChangbin Du <changbin.du@gmail.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>