pinctrl: tegra: init Tegra20/30 at module_init time

The Tegra20/30 pinctrl drivers currently initializes at arch_initcall,
whereas Tegra114/124 pinctrl drivers initialize at module_init time.
Convert Tegra20/30 to work the same way as the other drivers.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/pinctrl-tegra20.c

@@ -2881,18 +2881,7 @@ static struct platform_driver tegra20_pinctrl_driver = {
 	.probe = tegra20_pinctrl_probe,
 	.remove = tegra_pinctrl_remove,
 };
-
-static int __init tegra20_pinctrl_init(void)
-{
-	return platform_driver_register(&tegra20_pinctrl_driver);
-}
-arch_initcall(tegra20_pinctrl_init);
-
-static void __exit tegra20_pinctrl_exit(void)
-{
-	platform_driver_unregister(&tegra20_pinctrl_driver);
-}
-module_exit(tegra20_pinctrl_exit);
+module_platform_driver(tegra20_pinctrl_driver);
 
 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 MODULE_DESCRIPTION("NVIDIA Tegra20 pinctrl driver");

drivers/pinctrl/pinctrl-tegra30.c

@@ -3745,18 +3745,7 @@ static struct platform_driver tegra30_pinctrl_driver = {
 	.probe = tegra30_pinctrl_probe,
 	.remove = tegra_pinctrl_remove,
 };
-
-static int __init tegra30_pinctrl_init(void)
-{
-	return platform_driver_register(&tegra30_pinctrl_driver);
-}
-arch_initcall(tegra30_pinctrl_init);
-
-static void __exit tegra30_pinctrl_exit(void)
-{
-	platform_driver_unregister(&tegra30_pinctrl_driver);
-}
-module_exit(tegra30_pinctrl_exit);
+module_platform_driver(tegra30_pinctrl_driver);
 
 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 MODULE_DESCRIPTION("NVIDIA Tegra30 pinctrl driver");