i2c/busses: Use module_platform_driver()

Convert the drivers in drivers/i2c/busses/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Jochen Friedrich <jochen@scram.de>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Barry Song <21cnbao@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Yong Zhang <yong.zhang0@gmail.com>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 1b46a9d..18068de 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -394,9 +394,6 @@
 };
 MODULE_DEVICE_TABLE(of, ocores_i2c_match);
 
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:ocores-i2c");
-
 static struct platform_driver ocores_i2c_driver = {
 	.probe   = ocores_i2c_probe,
 	.remove  = __devexit_p(ocores_i2c_remove),
@@ -409,19 +406,9 @@
 	},
 };
 
-static int __init ocores_i2c_init(void)
-{
-	return platform_driver_register(&ocores_i2c_driver);
-}
-
-static void __exit ocores_i2c_exit(void)
-{
-	platform_driver_unregister(&ocores_i2c_driver);
-}
-
-module_init(ocores_i2c_init);
-module_exit(ocores_i2c_exit);
+module_platform_driver(ocores_i2c_driver);
 
 MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
 MODULE_DESCRIPTION("OpenCores I2C bus driver");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ocores-i2c");