usb: phy: r-car gen2: use usb_add_phy_dev

Use usb_add_phy_dev instead of usb_add_phy, so that devices can
be bound to the phy. This is needed to set up USB phy for
some internal PCI USB host controllers on R-Car Gen2.

Signed-off-by: Valentine Barshak <[e-mail]>
Signed-off-by: Felipe Balbi <[e-mail]>

drivers/usb/phy/phy-rcar-gen2-usb.c

···
 	priv->phy.shutdown = rcar_gen2_usb_phy_shutdown;
 	priv->phy.set_suspend = rcar_gen2_usb_phy_set_suspend;
 
-	retval = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
+	retval = usb_add_phy_dev(&priv->phy);
 	if (retval < 0) {
 		dev_err(dev, "Failed to add USB phy\n");
 		return retval;