ath9k: fix a beacon buffer leak on interface up/down

SVN-Revision: 19233

package/mac80211/patches/570-ath9k_bcnslot_leak.patch

+--- a/drivers/net/wireless/ath/ath9k/main.c
++++ b/drivers/net/wireless/ath/ath9k/main.c
+@@ -1471,10 +1471,10 @@ static void ath9k_remove_interface(struc
+ 	    (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
+ 		ath9k_ps_wakeup(sc);
+ 		ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
+-		ath_beacon_return(sc, avp);
+ 		ath9k_ps_restore(sc);
+ 	}
+ 
++	ath_beacon_return(sc, avp);
+ 	sc->sc_flags &= ~SC_OP_BEACONS;
+ 
+ 	for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {