ASoC: Convert Samsung directory to module_platform_driver

Saves some boilerplate code.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Sangbeom Kim <sbkim73@samsung.com>
diff --git a/sound/soc/samsung/spdif.c b/sound/soc/samsung/spdif.c
index a1fee1a..a5a56a1 100644
--- a/sound/soc/samsung/spdif.c
+++ b/sound/soc/samsung/spdif.c
@@ -483,17 +483,7 @@
 	},
 };
 
-static int __init spdif_init(void)
-{
-	return platform_driver_register(&samsung_spdif_driver);
-}
-module_init(spdif_init);
-
-static void __exit spdif_exit(void)
-{
-	platform_driver_unregister(&samsung_spdif_driver);
-}
-module_exit(spdif_exit);
+module_platform_driver(samsung_spdif_driver);
 
 MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>");
 MODULE_DESCRIPTION("Samsung S/PDIF Controller Driver");