Merge branch 'doc-net-ieee802154-move-from-plain-text-to-rst'

Stefan Schmidt says:

====================
doc: net: ieee802154: move from plain text to rst

The ieee802154 subsystem doc was still in plain text. With the networking book
taking shape I thought it was time to do the first step and move it over to rst.
This really is only the minimal conversion. I need to take some time to update
and extend the docs.

The patches are based on net-next, but they only touch the networking book so I
would not expect and trouble. From what I have seen they would go through
Jonathan's tree after being acked by Dave? If you want this patches against a
different tree let me know.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>