ath5k: don't reset mcast filter when configuring the mode

We should not zero out the multicast hash when configuring
the operating mode, since a zero value means all multicast
frames will get dropped.  Also, ath5k_mode_setup() gets
called after any reset, so the hash already set up in
configure_filter() is lost.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/base.c

@@ -1125,7 +1125,6 @@ ath5k_mode_setup(struct ath5k_softc *sc)
 	/* configure operational mode */
 	ath5k_hw_set_opmode(ah);
 
-	ath5k_hw_set_mcast_filter(ah, 0, 0);
 	ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
 }