net: mdio: use macro module_driver to avoid boilerplate code

Use macro module_driver to avoid boilerplate code.

Signed-off-by: Heiner Kallweit <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/linux/mdio.h

···
  * init/exit. Each module may only use this macro once, and calling it
  * replaces module_init() and module_exit().
  */
-#define mdio_module_driver(_mdio_driver)				\
-static int __init mdio_module_init(void)				\
-{									\
-	return mdio_driver_register(&_mdio_driver);			\
-}									\
-module_init(mdio_module_init);						\
-static void __exit mdio_module_exit(void)				\
-{									\
-	mdio_driver_unregister(&_mdio_driver);				\
-}									\
-module_exit(mdio_module_exit)
+#define mdio_module_driver(_mdio_driver) \
+	module_driver(_mdio_driver, mdio_driver_register, mdio_driver_unregister)
 
 #endif /* __LINUX_MDIO_H__ */