ASoC: Convert davinci directory to module_platform_driver

Factor out some boilerplate code.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index f3d5ae1..ec18710 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -774,17 +774,7 @@
 	},
 };
 
-static int __init davinci_i2s_init(void)
-{
-	return platform_driver_register(&davinci_mcbsp_driver);
-}
-module_init(davinci_i2s_init);
-
-static void __exit davinci_i2s_exit(void)
-{
-	platform_driver_unregister(&davinci_mcbsp_driver);
-}
-module_exit(davinci_i2s_exit);
+module_platform_driver(davinci_mcbsp_driver);
 
 MODULE_AUTHOR("Vladimir Barinov");
 MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface");