mmc: wmt-sdmmc: Handle return value of clk_prepare_enable

clk_prepare_enable() can fail here and we must check its return value.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/wmt-sdmmc.c

@@ -856,7 +856,9 @@ static int wmt_mci_probe(struct platform_device *pdev)
 		goto fail5;
 	}
 
-	clk_prepare_enable(priv->clk_sdmmc);
+	ret = clk_prepare_enable(priv->clk_sdmmc);
+	if (ret)
+		goto fail6;
 
 	/* configure the controller to a known 'ready' state */
 	wmt_reset_hardware(mmc);
@@ -866,6 +868,8 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	dev_info(&pdev->dev, "WMT SDHC Controller initialized\n");
 
 	return 0;
+fail6:
+	clk_put(priv->clk_sdmmc);
 fail5:
 	free_irq(dma_irq, priv);
 fail4: