ath9k: set 4ADDRESS bit in RX filter for AR9550

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/mac.h b/drivers/net/wireless/ath/ath9k/mac.h
index 21c9556..0eba36d 100644
--- a/drivers/net/wireless/ath/ath9k/mac.h
+++ b/drivers/net/wireless/ath/ath9k/mac.h
@@ -646,6 +646,7 @@
 	ATH9K_RX_FILTER_PHYRADAR = 0x00002000,
 	ATH9K_RX_FILTER_MCAST_BCAST_ALL = 0x00008000,
 	ATH9K_RX_FILTER_CONTROL_WRAPPER = 0x00080000,
+	ATH9K_RX_FILTER_4ADDRESS = 0x00100000,
 };
 
 #define ATH9K_RATESERIES_RTS_CTS  0x0001