USB: s3c-hsotg: return proper error if clk_get fails

Return PTR_ERR(hsotg->clk) instead of -EINVAL if clk_get fails
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/s3c-hsotg.c

@@ -3318,7 +3318,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
 	hsotg->clk = clk_get(&pdev->dev, "otg");
 	if (IS_ERR(hsotg->clk)) {
 		dev_err(dev, "cannot get otg clock\n");
-		ret = -EINVAL;
+		ret = PTR_ERR(hsotg->clk);
 		goto err_mem;
 	}