gpio: pxa: use devres for the clock struct

The clock is never released after probe(). Use devres to not leak
resources.

Reported-by: Hulk Robot <hulkci@huawei.com>
Reported-by: Yuan Can <yuancan@huawei.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Author: brgl

drivers/gpio/gpio-pxa.c

@@ -661,24 +661,17 @@ static int pxa_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gpio_reg_base))
 		return PTR_ERR(gpio_reg_base);
 
-	clk = clk_get(&pdev->dev, NULL);
+	clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(clk)) {
 		dev_err(&pdev->dev, "Error %ld to get gpio clock\n",
 			PTR_ERR(clk));
 		return PTR_ERR(clk);
 	}
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		clk_put(clk);
-		return ret;
-	}
 
 	/* Initialize GPIO chips */
 	ret = pxa_init_gpio_chip(pchip, pxa_last_gpio + 1, gpio_reg_base);
-	if (ret) {
-		clk_put(clk);
+	if (ret)
 		return ret;
-	}
 
 	/* clear all GPIO edge detects */
 	for_each_gpio_bank(gpio, c, pchip) {