ASoC: wm8978: Use module_i2c_driver

module_i2c_driver makes the code simpler by eliminating module_init
and module_exit calls.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8978.c

@@ -1105,23 +1105,7 @@ static struct i2c_driver wm8978_i2c_driver = {
 	.id_table = wm8978_i2c_id,
 };
 
-static int __init wm8978_modinit(void)
-{
-	int ret = 0;
-	ret = i2c_add_driver(&wm8978_i2c_driver);
-	if (ret != 0) {
-		printk(KERN_ERR "Failed to register WM8978 I2C driver: %d\n",
-		       ret);
-	}
-	return ret;
-}
-module_init(wm8978_modinit);
-
-static void __exit wm8978_exit(void)
-{
-	i2c_del_driver(&wm8978_i2c_driver);
-}
-module_exit(wm8978_exit);
+module_i2c_driver(wm8978_i2c_driver);
 
 MODULE_DESCRIPTION("ASoC WM8978 codec driver");
 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");