ath9k_hw: store the clock rate in common data on channel changes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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 cee0191..b36d9d7 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -145,6 +145,8 @@
 	DECLARE_BITMAP(tkip_keymap, ATH_KEYMAX);
 	enum ath_crypt_caps crypt_caps;
 
+	unsigned int clockrate;
+
 	struct ath_regulatory regulatory;
 	const struct ath_ops *ops;
 	const struct ath_bus_ops *bus_ops;