powerpc/83xx: use module_i2c_driver to simplify the code

Use the module_i2c_driver() macro to make the code smaller
and a bit simpler.

dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Scott Wood <scottwood@freescale.com>

arch/powerpc/platforms/83xx/mcu_mpc8349emitx.c

@@ -231,17 +231,7 @@ static struct i2c_driver mcu_driver = {
 	.id_table = mcu_ids,
 };
 
-static int __init mcu_init(void)
-{
-	return i2c_add_driver(&mcu_driver);
-}
-module_init(mcu_init);
-
-static void __exit mcu_exit(void)
-{
-	i2c_del_driver(&mcu_driver);
-}
-module_exit(mcu_exit);
+module_i2c_driver(mcu_driver);
 
 MODULE_DESCRIPTION("Power Management and GPIO expander driver for "
 		   "MPC8349E-mITX-compatible MCU");