gpio: mvebu: Remove initcall-based driver initialization

There's no reason to use an initcall to initialize this driver,
and regular module_platform_driver() can be used instead.

Signed-off-by: Ezequiel Garcia <[e-mail]>
Reviewed-by: Javier Martinez Canillas <[e-mail]>
Acked-by: Jason Cooper <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-mvebu.c

···
 	},
 	.probe		= mvebu_gpio_probe,
 };
-
-static int __init mvebu_gpio_init(void)
-{
-	return platform_driver_register(&mvebu_gpio_driver);
-}
-postcore_initcall(mvebu_gpio_init);
+module_platform_driver(mvebu_gpio_driver);