atheros: add ieee80211_hw to ath_common

Make use of it on hw code in ath9k to avoid
using the ath9k ath_softc.

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/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
index e4f9559..9682c49 100644
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -271,7 +271,7 @@
 
 static void ath9k_hw_ani_ofdm_err_trigger(struct ath_hw *ah)
 {
-	struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
+	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
 	struct ar5416AniState *aniState;
 	int32_t rssi;
 
@@ -343,7 +343,7 @@
 
 static void ath9k_hw_ani_cck_err_trigger(struct ath_hw *ah)
 {
-	struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
+	struct ieee80211_conf *conf = &ath9k_hw_common(ah)->hw->conf;
 	struct ar5416AniState *aniState;
 	int32_t rssi;