net: dsa: qca8k: use mdio_module_driver to simplify the code

mdio_module_driver() makes the code simpler by eliminating
boilerplate code.

Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/dsa/qca8k.c

···
 	},
 };
 
-static int __init
-qca8kmdio_driver_register(void)
-{
-	return mdio_driver_register(&qca8kmdio_driver);
-}
-module_init(qca8kmdio_driver_register);
-
-static void __exit
-qca8kmdio_driver_unregister(void)
-{
-	mdio_driver_unregister(&qca8kmdio_driver);
-}
-module_exit(qca8kmdio_driver_unregister);
+mdio_module_driver(qca8kmdio_driver);
 
 MODULE_AUTHOR("Mathieu Olivari, John Crispin <[e-mail]>");
 MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family");