ath5k: support for FIF_FCSFAIL filter

When the FIF_FCSFAIL filter flag is set, pass frames with CRC errors.

Signed-off-by: Mathy Vanhoef <vanhoefm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/ath5k.h

@@ -1285,6 +1285,7 @@ struct ath5k_hw {
 #define ATH_STAT_STARTED	3		/* opened & irqs enabled */
 
 	unsigned int		filter_flags;	/* HW flags, AR5K_RX_FILTER_* */
+	unsigned int		fif_filter_flags; /* Current FIF_* filter flags */
 	struct ieee80211_channel *curchan;	/* current h/w channel */
 
 	u16			nvifs;