ASoC: Convert wm8904 to devm_kzalloc()

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

sound/soc/codecs/wm8904.c

@@ -2531,7 +2531,8 @@ static __devinit int wm8904_i2c_probe(struct i2c_client *i2c,
 	struct wm8904_priv *wm8904;
 	int ret;
 
-	wm8904 = kzalloc(sizeof(struct wm8904_priv), GFP_KERNEL);
+	wm8904 = devm_kzalloc(&i2c->dev, sizeof(struct wm8904_priv),
+			      GFP_KERNEL);
 	if (wm8904 == NULL)
 		return -ENOMEM;
 
@@ -2541,15 +2542,13 @@ static __devinit int wm8904_i2c_probe(struct i2c_client *i2c,
 
 	ret = snd_soc_register_codec(&i2c->dev,
 			&soc_codec_dev_wm8904, &wm8904_dai, 1);
-	if (ret < 0)
-		kfree(wm8904);
+
 	return ret;
 }
 
 static __devexit int wm8904_i2c_remove(struct i2c_client *client)
 {
 	snd_soc_unregister_codec(&client->dev);
-	kfree(i2c_get_clientdata(client));
 	return 0;
 }