net: mdio-gpio: Use module_platform_driver()

module_platform_driver macro removes some boilerplate and
simplifies the code.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-gpio.c

@@ -235,17 +235,7 @@ static struct platform_driver mdio_gpio_driver = {
 	},
 };
 
-static int __init mdio_gpio_init(void)
-{
-	return platform_driver_register(&mdio_gpio_driver);
-}
-module_init(mdio_gpio_init);
-
-static void __exit mdio_gpio_exit(void)
-{
-	platform_driver_unregister(&mdio_gpio_driver);
-}
-module_exit(mdio_gpio_exit);
+module_platform_driver(mdio_gpio_driver);
 
 MODULE_ALIAS("platform:mdio-gpio");
 MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas");