Hisilicon hi6220 usb PHY
-----------------------

Required properties:
- compatible: should be "hisilicon,hi6220-usb-phy"
- #phy-cells: must be 0
- hisilicon,peripheral-syscon: phandle of syscon used to control phy.
Refer to phy/phy-bindings.txt for the generic PHY binding properties

Example:
	usb_phy: usbphy {
		compatible = "hisilicon,hi6220-usb-phy";
		#phy-cells = <0>;
		phy-supply = <&fixed_5v_hub>;
		hisilicon,peripheral-syscon = <&sys_ctrl>;
	};