mac80211: configure BSS_CHANGED_ARP_FILTER on reconfiguration

Configure arp filtering on sta reconfiguration.
Signed-off-by: NEliad Peller <eliad@wizery.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

net/mac80211/util.c

@@ -1234,7 +1234,8 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 
 		switch (sdata->vif.type) {
 		case NL80211_IFTYPE_STATION:
-			changed |= BSS_CHANGED_ASSOC;
+			changed |= BSS_CHANGED_ASSOC |
+				   BSS_CHANGED_ARP_FILTER;
 			mutex_lock(&sdata->u.mgd.mtx);
 			ieee80211_bss_info_change_notify(sdata, changed);
 			mutex_unlock(&sdata->u.mgd.mtx);