mac80211: support userspace MPM

Earlier mac80211 would check whether some kind of mesh
security was enabled, when the real question was "is the
MPM in userspace"?

Signed-off-by: Thomas Pedersen <thomas@cozybit.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -588,6 +588,7 @@ struct ieee80211_if_mesh {
 		IEEE80211_MESH_SEC_AUTHED = 0x1,
 		IEEE80211_MESH_SEC_SECURED = 0x2,
 	} security;
+	bool user_mpm;
 	/* Extensible Synchronization Framework */
 	const struct ieee80211_mesh_sync_ops *sync_ops;
 	s64 sync_offset_clockdrift_max;