mac80211: handle operating mode notif in beacon/assoc response

In beacons and association response frames an AP may include an
operating mode notification element to advertise changes in the
number of spatial streams it can receive. Handle this using the
existing function that handles the action frame, but only handle
NSS changes, not bandwidth changes which aren't allowed here.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 1617e0b..30f1ba6 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2459,7 +2459,8 @@
 			opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
 
 			ieee80211_vht_handle_opmode(rx->sdata, rx->sta,
-						    opmode, status->band);
+						    opmode, status->band,
+						    false);
 			goto handled;
 		}
 		default: