ASoC: img-spdif-out: Fix runtime PM imbalance on error

pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20200527084610.4790-1-dinghao.liu@zju.edu.cnSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/img/img-spdif-out.c

@@ -370,8 +370,10 @@ static int img_spdif_out_probe(struct platform_device *pdev)
 			goto err_pm_disable;
 	}
 	ret = pm_runtime_get_sync(&pdev->dev);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(&pdev->dev);
 		goto err_suspend;
+	}
 
 	img_spdif_out_writel(spdif, IMG_SPDIF_OUT_CTL_FS_MASK,
 			     IMG_SPDIF_OUT_CTL);