rt2x00: Move intf_work to mac82011 workqueue

ieee80211_iterate_active_interfaces() no longer acquires the
RTNL lock which means the intf_work handler can be safely
used from the mac80211 workqueue again.
Signed-off-by: NIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00dev.c

@@ -215,7 +215,7 @@ void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
 						   rt2x00lib_beacondone_iter,
 						   rt2x00dev);
 
-	schedule_work(&rt2x00dev->intf_work);
+	queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
 }
 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);