mac80211: make beacon filtering per virtual interface

Due to firmware limitations, we may not be able to
support beacon filtering on all virtual interfaces.
To allow this in mac80211, introduce per-interface
driver capability flags that the driver sets when
an interface is added.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 95d3964..b51eb49 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -127,7 +127,7 @@
 
 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
 {
-	if (sdata->local->hw.flags & IEEE80211_HW_BEACON_FILTER)
+	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
 		return;
 
 	mod_timer(&sdata->u.mgd.bcn_mon_timer,