mmc: au1xmmc: fix error return code in au1xmmc_probe()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NUlf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/au1xmmc.c

@@ -1028,9 +1028,12 @@ static int au1xmmc_probe(struct platform_device *pdev)
 	host->clk = clk_get(&pdev->dev, ALCHEMY_PERIPH_CLK);
 	if (IS_ERR(host->clk)) {
 		dev_err(&pdev->dev, "cannot find clock\n");
+		ret = PTR_ERR(host->clk);
 		goto out_irq;
 	}
-	if (clk_prepare_enable(host->clk)) {
+
+	ret = clk_prepare_enable(host->clk);
+	if (ret) {
 		dev_err(&pdev->dev, "cannot enable clock\n");
 		goto out_clk;
 	}