Input: gameport - use module_gameport_driver

This patch converts the drivers in drivers/input/* to use
module_gameport_driver() macro which makes the code smaller
and a bit simpler.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/joystick/a3d.c

@@ -413,15 +413,4 @@ static struct gameport_driver a3d_drv = {
 	.disconnect	= a3d_disconnect,
 };
 
-static int __init a3d_init(void)
-{
-	return gameport_register_driver(&a3d_drv);
-}
-
-static void __exit a3d_exit(void)
-{
-	gameport_unregister_driver(&a3d_drv);
-}
-
-module_init(a3d_init);
-module_exit(a3d_exit);
+module_gameport_driver(a3d_drv);