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/dfbmcs320.c b/sound/soc/codecs/dfbmcs320.c
index 704bbde..bfe46aa 100644
--- a/sound/soc/codecs/dfbmcs320.c
+++ b/sound/soc/codecs/dfbmcs320.c
@@ -55,17 +55,7 @@
 	.remove = __devexit_p(dfbmcs320_remove),
 };
 
-static int __init dfbmcs320_init(void)
-{
-	return platform_driver_register(&dfmcs320_driver);
-}
-module_init(dfbmcs320_init);
-
-static void __exit dfbmcs320_exit(void)
-{
-	platform_driver_unregister(&dfmcs320_driver);
-}
-module_exit(dfbmcs320_exit);
+module_platform_driver(dfmcs320_driver);
 
 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 MODULE_DESCRIPTION("ASoC DFBM-CS320 bluethooth module driver");