Input: keyboard - use macro module_platform_driver()

Commit 940ab88962bc1aff3273a8356d64577a6e386736 introduced a new macro to
save some platform_driver boilerplate code. Use it.

Signed-off-by: JJ Ding <dgdunix@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c
index 323bcdf..6b630d9 100644
--- a/drivers/input/keyboard/omap-keypad.c
+++ b/drivers/input/keyboard/omap-keypad.c
@@ -473,20 +473,7 @@
 		.owner	= THIS_MODULE,
 	},
 };
-
-static int __init omap_kp_init(void)
-{
-	printk(KERN_INFO "OMAP Keypad Driver\n");
-	return platform_driver_register(&omap_kp_driver);
-}
-
-static void __exit omap_kp_exit(void)
-{
-	platform_driver_unregister(&omap_kp_driver);
-}
-
-module_init(omap_kp_init);
-module_exit(omap_kp_exit);
+module_platform_driver(omap_kp_driver);
 
 MODULE_AUTHOR("Timo Teräs");
 MODULE_DESCRIPTION("OMAP Keypad Driver");