gpio: siox: Use module_siox_driver()

Reduce driver init boilerplate by using the new
module_siox_driver() macro.
Signed-off-by: Enrico Weigelt <info@metux.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-siox.c

@@ -275,18 +275,7 @@ static struct siox_driver gpio_siox_driver = {
 		.name = "gpio-siox",
 	},
 };
-
-static int __init gpio_siox_init(void)
-{
-	return siox_driver_register(&gpio_siox_driver);
-}
-module_init(gpio_siox_init);
-
-static void __exit gpio_siox_exit(void)
-{
-	siox_driver_unregister(&gpio_siox_driver);
-}
-module_exit(gpio_siox_exit);
+module_siox_driver(gpio_siox_driver);
 
 MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
 MODULE_DESCRIPTION("SIOX gpio driver");