phy: berlin-usb: Use PTR_ERR_OR_ZERO

PTR_ERR_OR_ZERO simplifies the code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/phy-berlin-usb.c

@@ -202,10 +202,7 @@ static int phy_berlin_usb_probe(struct platform_device *pdev)
 
 	phy_provider =
 		devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
-	if (IS_ERR(phy_provider))
-		return PTR_ERR(phy_provider);
-
-	return 0;
+	return PTR_ERR_OR_ZERO(phy_provider);
 }
 
 static struct platform_driver phy_berlin_usb_driver = {