mfd: Convert MFD drivers to use module_platform_driver

Factors out some boilerplate code for drivers doing the default thing
for platform driver registration. Drivers using platform_driver_probe
or an initcall other than module_init can't be converted.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/tc6387xb.c b/drivers/mfd/tc6387xb.c
index 71bc835..d20a284 100644
--- a/drivers/mfd/tc6387xb.c
+++ b/drivers/mfd/tc6387xb.c
@@ -234,19 +234,7 @@
 	.resume         = tc6387xb_resume,
 };
 
-
-static int __init tc6387xb_init(void)
-{
-	return platform_driver_register(&tc6387xb_platform_driver);
-}
-
-static void __exit tc6387xb_exit(void)
-{
-	platform_driver_unregister(&tc6387xb_platform_driver);
-}
-
-module_init(tc6387xb_init);
-module_exit(tc6387xb_exit);
+module_platform_driver(tc6387xb_platform_driver);
 
 MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
 MODULE_LICENSE("GPL v2");