rockchip: usb: Migrate to use ofnode

Migrate to use ofnode_* instead of fdt_* so that we may able to use live
dt for usb udc driver.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/include/usb/dwc2_udc.h b/include/usb/dwc2_udc.h
index a6c1221..a2af381 100644
--- a/include/usb/dwc2_udc.h
+++ b/include/usb/dwc2_udc.h
@@ -8,12 +8,14 @@
 #ifndef __DWC2_USB_GADGET
 #define __DWC2_USB_GADGET
 
+#include <dm/ofnode.h>
+
 #define PHY0_SLEEP              (1 << 5)
 #define DWC2_MAX_HW_ENDPOINTS	16
 
 struct dwc2_plat_otg_data {
 	void		*priv;
-	int		phy_of_node;
+	ofnode		phy_of_node;
 	int		(*phy_control)(int on);
 	uintptr_t	regs_phy;
 	uintptr_t	regs_otg;