pinctrl: at91: Merge clk_prepare and clk_enable into clk_prepare_enable

This simplifies the normal as well as the error path.
Signed-off-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-at91.c

@@ -1722,14 +1722,9 @@ static int at91_gpio_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	ret = clk_prepare(at91_chip->clock);
-	if (ret)
-		goto clk_prepare_err;
-
-	/* enable PIO controller's clock */
-	ret = clk_enable(at91_chip->clock);
+	ret = clk_prepare_enable(at91_chip->clock);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to enable clock, ignoring.\n");
+		dev_err(&pdev->dev, "failed to prepare and enable clock, ignoring.\n");
 		goto clk_enable_err;
 	}
 
@@ -1789,10 +1784,8 @@ static int at91_gpio_probe(struct platform_device *pdev)
 irq_setup_err:
 	gpiochip_remove(chip);
 gpiochip_add_err:
-	clk_disable(at91_chip->clock);
 clk_enable_err:
-	clk_unprepare(at91_chip->clock);
-clk_prepare_err:
+	clk_disable_unprepare(at91_chip->clock);
 err:
 	dev_err(&pdev->dev, "Failure %i for GPIO %i\n", ret, alias_idx);