Rockchip specific extensions to the Analogix Display Port PHY
------------------------------------

Required properties:
- compatible : should be one of the following supported values:
	 - "rockchip.rk3288-dp-phy"
- clocks: from common clock binding: handle to dp clock.
	of memory mapped region.
- clock-names: from common clock binding:
	Required elements: "24m"
- rockchip,grf: phandle to the syscon managing the "general register files"
- #phy-cells : from the generic PHY bindings, must be 0;

Example:

edp_phy: edp-phy {
	compatible = "rockchip,rk3288-dp-phy";
	rockchip,grf = <&grf>;
	clocks = <&cru SCLK_EDP_24M>;
	clock-names = "24m";
	#phy-cells = <0>;
};