* Xilinx AXI Traffic generator IP

Required properties:
- compatible: "xlnx,axi-traffic-gen"
- interrupts: Should contain AXI Traffic Generator interrupts.
- interrupt-parent: Must be core interrupt controller.
- reg: Should contain AXI Traffic Generator registers location and length.
- interrupt-names: Should contain both the intr names of device - error
		   and completion.
- xlnx,device-id: Device instance Id.

Optional properties:
- clocks: Input clock specifier. Refer to common clock bindings.

Example:
++++++++
axi_traffic_gen_1: axi-traffic-gen@76000000 {
	compatible = "xlnx,axi-traffic-gen-1.0", "xlnx,axi-traffic-gen";
	clocks = <&clkc 15>;
	interrupts = <0 2 2 2>;
	interrupt-parent = <&axi_intc_1>;
	interrupt-names = "err-out", "irq-out";
	reg = <0x76000000 0x800000>;
	xlnx,device-id = <0x0>;
} ;
