usb: chipidea: imx: "fsl,usbphy" phandle is not mandatory now

Since the chipidea common code support get the USB PHY phandle from
"phys", the glue layer is not mandatory to get the "fsl,usbphy" phandle
any more.

Signed-off-by: Peter Chen <peter.chen@nxp.com>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -398,8 +398,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 		ret = PTR_ERR(data->phy);
 		/* Return -EINVAL if no usbphy is available */
 		if (ret == -ENODEV)
-			ret = -EINVAL;
-		goto err_clk;
+			data->phy = NULL;
+		else
+			goto err_clk;
 	}
 
 	pdata.usb_phy = data->phy;