Calxeda Highbank Combination Phys for SATA

Properties:
- compatible : Should be "calxeda,hb-combophy"
- #phy-cells: Should be 1.
- reg : Address and size for Combination Phy registers.
- phydev: device ID for programming the combophy.

Example:

	combophy5: combo-phy@fff5d000 {
		compatible = "calxeda,hb-combophy";
		#phy-cells = <1>;
		reg = <0xfff5d000 0x1000>;
		phydev = <31>;
	};