usb: phy: propagate __of_usb_find_phy()'s error on failure

When __of_usb_find_phy() fails, it returns -ENODEV - its
error code has to be returned by devm_usb_get_phy_by_phandle().
Only when the former function succeeds and try_module_get()
fails should -EPROBE_DEFER be returned.

[ balbi@ti.com : remove trailing whitespace ]
Signed-off-by: NArjun Sreedharan <arjun024@gmail.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/phy/phy.c

@@ -191,7 +191,9 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
 
 	phy = __of_usb_find_phy(node);
 	if (IS_ERR(phy) || !try_module_get(phy->dev->driver->owner)) {
-		phy = ERR_PTR(-EPROBE_DEFER);
+		if (!IS_ERR(phy))
+			phy = ERR_PTR(-EPROBE_DEFER);
+
 		devres_free(ptr);
 		goto err1;
 	}