usb: musb: dsps: request phy using our device pointer

musb shouldn't have of_node and phy phandle is passed
to dsps device, not musb's.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_dsps.c

@@ -432,7 +432,7 @@ static int dsps_musb_init(struct musb *musb)
 	musb->ctrl_base = reg_base;
 
 	/* NOP driver needs change if supporting dual instance */
-	musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);
+	musb->xceiv = devm_usb_get_phy_by_phandle(dev->parent, "phys", 0);
 	if (IS_ERR(musb->xceiv))
 		return PTR_ERR(musb->xceiv);