update nl80211.h

The file is a merge of upstream mac80211 and mac80211-next trees as
otherwise iw fails to compile on NL80211_FEATURE_P2P_DEVICE_NEEDS_CHANNEL.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
iw: print expected throughput when dumping station

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>