atheros: move tx/rx chainmask to ath_common

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h
index 2ca9701..38ca68e 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -56,6 +56,9 @@
 	u8 curbssid[ETH_ALEN];
 	u8 bssidmask[ETH_ALEN];
 
+	u8 tx_chainmask;
+	u8 rx_chainmask;
+
 	struct ath_regulatory regulatory;
 	const struct ath_ops *ops;
 };