* Freescale MXS USB Phy Device

Required properties:
- compatible: should contain:
	* "fsl,imx23-usbphy" for imx23 and imx28
	* "fsl,imx6q-usbphy" for imx6dq and imx6dl
	* "fsl,imx6sl-usbphy" for imx6sl
  "fsl,imx23-usbphy" is still a fallback for other strings
- reg: Should contain registers location and length
- interrupts: Should contain phy interrupt
- fsl,anatop: phandle for anatop register, it is only for imx6 SoC series

Example:
usbphy1: usbphy@020c9000 {
	compatible = "fsl,imx6q-usbphy", "fsl,imx23-usbphy";
	reg = <0x020c9000 0x1000>;
	interrupts = <0 44 0x04>;
	fsl,anatop = <&anatop>;
};