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>
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index 9c9a51e..a57cfbc 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -825,17 +825,7 @@
 	.remove = __devexit_p(asoc_ssp_remove),
 };
 
-static int __init pxa_ssp_init(void)
-{
-	return platform_driver_register(&asoc_ssp_driver);
-}
-module_init(pxa_ssp_init);
-
-static void __exit pxa_ssp_exit(void)
-{
-	platform_driver_unregister(&asoc_ssp_driver);
-}
-module_exit(pxa_ssp_exit);
+module_platform_driver(asoc_ssp_driver);
 
 /* Module information */
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");