Input: misc - 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/misc/pwm-beeper.c b/drivers/input/misc/pwm-beeper.c
index 57c294f..fc84c8a 100644
--- a/drivers/input/misc/pwm-beeper.c
+++ b/drivers/input/misc/pwm-beeper.c
@@ -180,18 +180,7 @@
 		.pm	= PWM_BEEPER_PM_OPS,
 	},
 };
-
-static int __init pwm_beeper_init(void)
-{
-	return platform_driver_register(&pwm_beeper_driver);
-}
-module_init(pwm_beeper_init);
-
-static void __exit pwm_beeper_exit(void)
-{
-	platform_driver_unregister(&pwm_beeper_driver);
-}
-module_exit(pwm_beeper_exit);
+module_platform_driver(pwm_beeper_driver);
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("PWM beeper driver");