pinctrl: at91: Use devm_pinctrl_register() for pinctrl registration

Use devm_pinctrl_register() for pin control registration and remove
the need of .remove callback.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-at91.c

@@ -1252,7 +1252,8 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	}
 
 	platform_set_drvdata(pdev, info);
-	info->pctl = pinctrl_register(&at91_pinctrl_desc, &pdev->dev, info);
+	info->pctl = devm_pinctrl_register(&pdev->dev, &at91_pinctrl_desc,
+					   info);
 
 	if (IS_ERR(info->pctl)) {
 		dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n");
@@ -1269,15 +1270,6 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int at91_pinctrl_remove(struct platform_device *pdev)
-{
-	struct at91_pinctrl *info = platform_get_drvdata(pdev);
-
-	pinctrl_unregister(info->pctl);
-
-	return 0;
-}
-
 static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
 	struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
@@ -1821,7 +1813,6 @@ static struct platform_driver at91_pinctrl_driver = {
 		.of_match_table = at91_pinctrl_of_match,
 	},
 	.probe = at91_pinctrl_probe,
-	.remove = at91_pinctrl_remove,
 };
 
 static struct platform_driver * const drivers[] = {