{nl,mac}80211: report gate connectivity in station info

Capture the current state of gate connectivity from the mesh
formation field in mesh config whenever we receive a beacon,
and report that via GET_STATION.  This allows applications
doing mesh peering in userspace to make peering decisions
based on peers' current upstream connectivity.

Signed-off-by: Bob Copeland <bobcopeland@fb.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 0ef67f8..407d6fd 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -812,6 +812,8 @@ enum mesh_config_capab_flags {
 	IEEE80211_MESHCONF_CAPAB_POWER_SAVE_LEVEL	= 0x40,
 };
 
+#define IEEE80211_MESHCONF_FORM_CONNECTED_TO_GATE 0x1
+
 /**
  * mesh channel switch parameters element's flag indicator
  *