mac802154: basic mib support

Basic support for IEEE 802.15.4 management information base.
Current implementation contains a command to set HW address only.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/mac802154/Makefile
Simple merge

diff --cc net/mac802154/mac802154.h
Simple merge

diff --cc net/mac802154/mib.c
Simple merge