usb: ci_hdrc_imx: Return -EINVAL for missing USB PHY

-ENODEV is interpreted by the generic driver probing function as a
non-matching driver. This leads to a missing probe failure message.

Also a missing USB PHY is more of an invalid configuration of the usb
driver because it is necessary.

This patch returns -EINVAL if devm_usb_get_phy_by_phandle() returned -ENODEV.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -133,6 +133,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 	data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
 	if (IS_ERR(data->phy)) {
 		ret = PTR_ERR(data->phy);
+		/* Return -EINVAL if no usbphy is available */
+		if (ret == -ENODEV)
+			ret = -EINVAL;
 		goto err_clk;
 	}