Realtek rts39xx SoC USB Device Properties

Required properties:
- compatible: "realtek,rts3903-otg"
- reg: Address and length of the register set for the device
- interrupt-parent: Phandle of the parent interrupt controller
- interrupts: Should contain ethernet controller interrupt
- resets: List of phandle and reset specifier pairs, one pair for
each reset signal that affects the device
- reset-names: List of reset signal name strings sorted in the same order as
the resets property

Example:

usb_device: dwc_otg@18200000 {
			compatible = "realtek,rts3903-otg";
			reg = <0x18200000 0x40000>;
			interrupt-parent = <&cpuintc>;
			interrupts = <BSP_IRQ_USBDEV>;
			resets = <&reset FORCE_RESET_U2DEV>,	\
			<&sysmem SYS_MEM_SD_U2DEV>;
			reset-names = "reset-usb-device", "u2dev-sysmem-up";
};
