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/ad1980.c b/sound/soc/codecs/ad1980.c
index e3931cc..9bba7f8 100644
--- a/sound/soc/codecs/ad1980.c
+++ b/sound/soc/codecs/ad1980.c
@@ -277,17 +277,7 @@
 	.remove = __devexit_p(ad1980_remove),
 };
 
-static int __init ad1980_init(void)
-{
-	return platform_driver_register(&ad1980_codec_driver);
-}
-module_init(ad1980_init);
-
-static void __exit ad1980_exit(void)
-{
-	platform_driver_unregister(&ad1980_codec_driver);
-}
-module_exit(ad1980_exit);
+module_platform_driver(ad1980_codec_driver);
 
 MODULE_DESCRIPTION("ASoC ad1980 driver (Obsolete)");
 MODULE_AUTHOR("Roy Huang, Cliff Cai");