ASoC: Convert pxa directory to module_platform_driver

Factor out some boilerplate code.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/pxa/palm27x.c

@@ -201,18 +201,7 @@ static struct platform_driver palm27x_wm9712_driver = {
 	},
 };
 
-static int __init palm27x_asoc_init(void)
-{
-	return platform_driver_register(&palm27x_wm9712_driver);
-}
-
-static void __exit palm27x_asoc_exit(void)
-{
-	platform_driver_unregister(&palm27x_wm9712_driver);
-}
-
-module_init(palm27x_asoc_init);
-module_exit(palm27x_asoc_exit);
+module_platform_driver(palm27x_wm9712_driver);
 
 /* Module information */
 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");