ath9k: Fix wlan-active gpio for the AR9003 family

When disabling BTCOEX, clearing the wlanactive gpio line
is required only for pre-AR9003 cards.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath9k/btcoex.c

@@ -361,7 +361,8 @@ void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 		return;
 	}
 
-	ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
+	if (!AR_SREV_9300_20_OR_LATER(ah))
+		ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 
 	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);