ath9k: Fix FIF_BCN_PRBRESP_PROMISC handling

So that a new created IBSS network
doesn't break on the first scan.

It seems to Sujith and me that this
stupid code unnecessary, too.

So remove it...
Signed-off-by: NAlina Friedrichsen <x-alina@gmx.net>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath9k/main.c

@@ -2410,14 +2410,6 @@ static void ath9k_configure_filter(struct ieee80211_hw *hw,
 	rfilt = ath_calcrxfilter(sc);
 	ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
 
-	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
-		if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
-			memcpy(sc->curbssid, ath_bcast_mac, ETH_ALEN);
-			sc->curaid = 0;
-			ath9k_hw_write_associd(sc);
-		}
-	}
-
 	DPRINTF(sc, ATH_DBG_CONFIG, "Set HW RX filter: 0x%x\n", sc->rx.rxfilter);
 }