ASoC: fix return value check in mt6351_codec_driver_probe()

In case of error, the function dev_get_regmap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/mt6351.c

@@ -1472,8 +1472,8 @@ static int mt6351_codec_driver_probe(struct platform_device *pdev)
 	priv->dev = &pdev->dev;
 
 	priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
-	if (IS_ERR(priv->regmap))
-		return PTR_ERR(priv->regmap);
+	if (!priv->regmap)
+		return -ENODEV;
 
 	dev_dbg(priv->dev, "%s(), dev name %s\n",
 		__func__, dev_name(&pdev->dev));