ath9k: Use ah_curchan and remove sc_curchan which is redundant

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 75a8492..9ea5d93 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -1456,7 +1456,7 @@
 
 		spin_lock_bh(&sc->sc_resetlock);
 		if (!ath9k_hw_reset(ah,
-			&sc->sc_curchan, ht_macmode,
+			sc->sc_ah->ah_curchan, ht_macmode,
 			sc->sc_tx_chainmask, sc->sc_rx_chainmask,
 			sc->sc_ht_extprotspacing, true, &status)) {