ASoC: wm8400: Use devm_regulator_bulk_get

devm_regulator_bulk_get() is device managed and makes error
handling and code cleanup simpler.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm8400.c

@@ -1373,7 +1373,7 @@ static int wm8400_codec_probe(struct snd_soc_codec *codec)
 	codec->control_data = priv->wm8400 = wm8400;
 	priv->codec = codec;
 
-	ret = regulator_bulk_get(wm8400->dev,
+	ret = devm_regulator_bulk_get(wm8400->dev,
 				 ARRAY_SIZE(power), &power[0]);
 	if (ret != 0) {
 		dev_err(codec->dev, "Failed to get regulators: %d\n", ret);
@@ -1398,15 +1398,9 @@ static int wm8400_codec_probe(struct snd_soc_codec *codec)
 	snd_soc_write(codec, WM8400_LEFT_OUTPUT_VOLUME, 0x50 | (1<<8));
 	snd_soc_write(codec, WM8400_RIGHT_OUTPUT_VOLUME, 0x50 | (1<<8));
 
-	if (!schedule_work(&priv->work)) {
-		ret = -EINVAL;
-		goto err_regulator;
-	}
+	if (!schedule_work(&priv->work))
+		return -EINVAL;
 	return 0;
-
-err_regulator:
-	regulator_bulk_free(ARRAY_SIZE(power), power);
-	return ret;
 }
 
 static int  wm8400_codec_remove(struct snd_soc_codec *codec)
@@ -1417,8 +1411,6 @@ static int  wm8400_codec_remove(struct snd_soc_codec *codec)
 	snd_soc_write(codec, WM8400_POWER_MANAGEMENT_1,
 		     reg & (~WM8400_CODEC_ENA));
 
-	regulator_bulk_free(ARRAY_SIZE(power), power);
-
 	return 0;
 }