iw:  Update nl80211.h  (not for upstream)

Bring in stuff needed to compile the next patch.

Signed-off-by: Ben Greear <greearb@candelatech.com>
iw: support setting vif MAC during creation

This saves an extra call to change it later, and will
also keep udev from potentially messing with a vif
it should not be messing with.

Signed-off-by: Ben Greear <greearb@candelatech.com>