update nl80211.h to 3.15 version
update nl80211.h to 3.15 version

Signed-off-by: Johannes Berg <bff32994ff0f8d048f262a8388145a71b6071bfe@intel.com>

bw-oss/iw,CTU-IIG/802.11p-iw,greearb/iw-ct,CTU-IIG/802.11p-iw,greearb/iw-ct,bw-oss/iw