ASoC: fsl_asrc: fix an error code in fsl_asrc_probe()

There is a cut and paste bug so it returns success instead of the error
code.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/fsl/fsl_asrc.c

@@ -826,7 +826,7 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 	asrc_priv->mem_clk = devm_clk_get(&pdev->dev, "mem");
 	if (IS_ERR(asrc_priv->mem_clk)) {
 		dev_err(&pdev->dev, "failed to get mem clock\n");
-		return PTR_ERR(asrc_priv->ipg_clk);
+		return PTR_ERR(asrc_priv->mem_clk);
 	}
 
 	asrc_priv->ipg_clk = devm_clk_get(&pdev->dev, "ipg");