ath9k: enable RXing of beacons on STA/IBSS

This enables beacons to come through on STA/IBSS.
It should fix sporadic connection issues. Right now
mac80211 expect beacons so give it beacons.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath9k/recv.c

@@ -296,9 +296,8 @@ u32 ath_calcrxfilter(struct ath_softc *sc)
 		rfilt &= ~ATH9K_RX_FILTER_UCAST;
 	}
 
-	if (((sc->sc_ah->ah_opmode == ATH9K_M_STA) &&
-	     (sc->rx_filter & FIF_BCN_PRBRESP_PROMISC)) ||
-	    (sc->sc_ah->ah_opmode == ATH9K_M_IBSS))
+	if (sc->sc_ah->ah_opmode == ATH9K_M_STA ||
+			sc->sc_ah->ah_opmode == ATH9K_M_IBSS)
 		rfilt |= ATH9K_RX_FILTER_BEACON;
 
 	/* If in HOSTAP mode, want to enable reception of PSPOLL frames