pinctrl: u300: 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>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-u300.c

@@ -1067,7 +1067,7 @@ static int u300_pmx_probe(struct platform_device *pdev)
 	if (IS_ERR(upmx->virtbase))
 		return PTR_ERR(upmx->virtbase);
 
-	upmx->pctl = pinctrl_register(&u300_pmx_desc, &pdev->dev, upmx);
+	upmx->pctl = devm_pinctrl_register(&pdev->dev, &u300_pmx_desc, upmx);
 	if (IS_ERR(upmx->pctl)) {
 		dev_err(&pdev->dev, "could not register U300 pinmux driver\n");
 		return PTR_ERR(upmx->pctl);
@@ -1080,15 +1080,6 @@ static int u300_pmx_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int u300_pmx_remove(struct platform_device *pdev)
-{
-	struct u300_pmx *upmx = platform_get_drvdata(pdev);
-
-	pinctrl_unregister(upmx->pctl);
-
-	return 0;
-}
-
 static const struct of_device_id u300_pinctrl_match[] = {
 	{ .compatible = "stericsson,pinctrl-u300" },
 	{},
@@ -1101,7 +1092,6 @@ static struct platform_driver u300_pmx_driver = {
 		.of_match_table = u300_pinctrl_match,
 	},
 	.probe = u300_pmx_probe,
-	.remove = u300_pmx_remove,
 };
 
 static int __init u300_pmx_init(void)