Xilinx Zynq MPSoC Firmware Device Tree Bindings

The zynqmp-pm node describes the interface to platform firmware.

Required properties:
 - compatible:	Must contain:  "xlnx,zynqmp-pm"
 - method:	The method of calling the PM-API firmware layer.
		Permitted values are:
		 - "smc" : To be used in configurations without a hypervisor
		 - "hvc" : To be used when hypervisor is present
 - interrupts:	Interrupt specifier

Optional Properties:
 - pinctrl-0: pin control group to be used for this controller
 - pinctrl-names: must contain a "default" entry

Examples:
	zynqmp-firmware {
		compatible = "xlnx,zynqmp-pm";
		method = "smc";
		interrupt-parent = <&gic>;
		interrupts = <0 35 4>;
	};
