Microsemi Ocelot SoC ICPU Interrupt Controller

Required properties:

- compatible : should be "mscc,ocelot-icpu-intr"
- reg : Specifies base physical address and size of the registers.
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Specifies the number of cells needed to encode an
  interrupt source. The value shall be 1.
- interrupt-parent : phandle of the CPU interrupt controller.
- interrupts : Specifies the CPU interrupt the controller is connected to.

Example:

		intc: interrupt-controller@70000070 {
			compatible = "mscc,ocelot-icpu-intr";
			reg = <0x70000070 0x70>;
			#interrupt-cells = <1>;
			interrupt-controller;
			interrupt-parent = <&cpuintc>;
			interrupts = <2>;
		};