wifi: ath9k: use devm for gpio_request_one()

Using devm_gpio_request_one() is simpler as then we don't need to call
gpio_free().

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Acked-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://patch.msgid.link/20240731210312.7622-1-rosenp@gmail.com

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

@@ -2732,7 +2732,7 @@ static void ath9k_hw_gpio_cfg_soc(struct ath_hw *ah, u32 gpio, bool out,
 	if (ah->caps.gpio_requested & BIT(gpio))
 		return;
 
-	err = gpio_request_one(gpio, out ? GPIOF_OUT_INIT_LOW : GPIOF_IN, label);
+	err = devm_gpio_request_one(ah->dev, gpio, out ? GPIOF_OUT_INIT_LOW : GPIOF_IN, label);
 	if (err) {
 		ath_err(ath9k_hw_common(ah), "request GPIO%d failed:%d\n",
 			gpio, err);
@@ -2801,10 +2801,8 @@ void ath9k_hw_gpio_free(struct ath_hw *ah, u32 gpio)
 
 	WARN_ON(gpio >= ah->caps.num_gpio_pins);
 
-	if (ah->caps.gpio_requested & BIT(gpio)) {
-		gpio_free(gpio);
+	if (ah->caps.gpio_requested & BIT(gpio))
 		ah->caps.gpio_requested &= ~BIT(gpio);
-	}
 }
 EXPORT_SYMBOL(ath9k_hw_gpio_free);