ASoC: wm8524: Do not print probe defer error

On an imx8mq-evk the following error is seen:

[    1.375809] wm8524-codec audio-codec: Failed to get mute line: -517

It happens because the codec driver may probe prior to the imx gpio
driver, which causes a probe defer.

Change to dev_err_probe() to avoid printing this error.
Reported-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210301193328.2123511-1-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8524.c

@@ -227,7 +227,7 @@ static int wm8524_codec_probe(struct platform_device *pdev)
 	wm8524->mute = devm_gpiod_get(&pdev->dev, "wlf,mute", GPIOD_OUT_LOW);
 	if (IS_ERR(wm8524->mute)) {
 		ret = PTR_ERR(wm8524->mute);
-		dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
+		dev_err_probe(&pdev->dev, ret, "Failed to get mute line\n");
 		return ret;
 	}