ASoC: Convert CODEC drivers to module_platform_driver

Factors out a bit of boilerplate.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm8782.c b/sound/soc/codecs/wm8782.c
index f2ced71..3fdea98 100644
--- a/sound/soc/codecs/wm8782.c
+++ b/sound/soc/codecs/wm8782.c
@@ -63,17 +63,7 @@
 	.remove = __devexit_p(wm8782_remove),
 };
 
-static int __init wm8782_init(void)
-{
-	return platform_driver_register(&wm8782_codec_driver);
-}
-module_init(wm8782_init);
-
-static void __exit wm8782_exit(void)
-{
-	platform_driver_unregister(&wm8782_codec_driver);
-}
-module_exit(wm8782_exit);
+module_platform_driver(wm8782_codec_driver);
 
 MODULE_DESCRIPTION("ASoC WM8782 driver");
 MODULE_AUTHOR("Johannes Stezenbach <js@sig21.net>");