Xilinx PCS/PMA PHY bindings

Required properties:
	- reg - The ID number for the phy, usually a small integer

Optional properties:
	- xlnx,phy-type - Describes type 1000BaseX (set to 0x5) or
			  SGMII (set to 0x4)

Example:

	ethernet-phy@9 {
		reg = <9>;
		xlnx,phy-type = <0x5>;
	};
