ASoC: Convert wm8978 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8978.c

@@ -997,7 +997,8 @@ static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
 	struct wm8978_priv *wm8978;
 	int ret;
 
-	wm8978 = kzalloc(sizeof(struct wm8978_priv), GFP_KERNEL);
+	wm8978 = devm_kzalloc(&i2c->dev, sizeof(struct wm8978_priv),
+			      GFP_KERNEL);
 	if (wm8978 == NULL)
 		return -ENOMEM;
 
@@ -1005,15 +1006,14 @@ static __devinit int wm8978_i2c_probe(struct i2c_client *i2c,
 
 	ret = snd_soc_register_codec(&i2c->dev,
 			&soc_codec_dev_wm8978, &wm8978_dai, 1);
-	if (ret < 0)
-		kfree(wm8978);
+
 	return ret;
 }
 
 static __devexit int wm8978_i2c_remove(struct i2c_client *client)
 {
 	snd_soc_unregister_codec(&client->dev);
-	kfree(i2c_get_clientdata(client));
+
 	return 0;
 }