Xilinx IIC controller:

Required properties:
- compatible : Must be "xlnx,xps-iic-2.00.a"
- reg : IIC register location and length
- interrupts : IIC controller unterrupt
- #address-cells = <1>
- #size-cells = <0>

Optional properties:
- Child nodes conforming to i2c bus binding

Example:

	axi_iic_0: i2c@40800000 {
		compatible = "xlnx,xps-iic-2.00.a";
		interrupts = < 1 2 >;
		reg = < 0x40800000 0x10000 >;

		#size-cells = <0>;
		#address-cells = <1>;
	};
