mac80211: Pass new RSSI level in CQM RSSI notification

Extend ieee80211_cqm_rssi_notify with a rssi_level parameter so that
this information can be passed to netlink clients in the next patch, if
available.  Most drivers will have this value at hand.  wl1251 receives
events from the firmware that only tell it whether latest measurement
is above or below threshold so we don't pass any value at this time
(parameter is 0).

Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/mlme.c

@@ -3419,14 +3419,14 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
 			ieee80211_cqm_rssi_notify(
 				&sdata->vif,
 				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
-				GFP_KERNEL);
+				sig, GFP_KERNEL);
 		} else if (sig > thold &&
 			   (last_event == 0 || sig > last_event + hyst)) {
 			ifmgd->last_cqm_event_signal = sig;
 			ieee80211_cqm_rssi_notify(
 				&sdata->vif,
 				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
-				GFP_KERNEL);
+				sig, GFP_KERNEL);
 		}
 	}
 
@@ -5041,11 +5041,12 @@ void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
 
 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
 			       enum nl80211_cqm_rssi_threshold_event rssi_event,
+			       s32 rssi_level,
 			       gfp_t gfp)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 
-	trace_api_cqm_rssi_notify(sdata, rssi_event);
+	trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level);
 
 	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
 }