Device-Tree bindings for Xilinx Chroma Resampler(CRESAMPLE)

Xilinx CRESAMPLE provides the chroma resampling of YUV formats.

Required properties:
 - compatible: value should be "xlnx,v-cresample-3.01.a"
 - reg: base address and size of the CRESAMPLE IP
 - xlnx,input-format, xlnx,output-format: the input/output video formats of
   CRESAMPLE. The value should be one of following format strings.

	yuv422
	yuv444
	yuv420

Example:

	v_cresample_0: v-cresample@40020000 {
		compatible = "xlnx,v-cresample-3.01.a";
		reg = <0x40020000 0x10000>;
		xlnx,input-format = "yuv444";
		xlnx,output-format = "yuv422";
	};
