* Spreadtrum sound audio cp dump driver

This node models spreadtrum sound audio cp dump driver

Required properties:
- compatible : "sprd,audio_dsp_log", "sprd,audio_dsp_mem"
	"sprd,audio_dsp_pcm"
- sprd-usemem-type : allocated memory block id for dump
- sprd-dst : communicate target, should be 1 for audio cp
- sprd-channel : communicate channel id, negotiate with dsp
- sprd-rxblocknum : share memory is divided several blocks.
	and sprd-rxblocknum is defined the block counts.
- sprd-rxblocksiz: eshare memory is divided several blocks.
	and sprd-rxblocknum is defined the size of one block.

Example:
audio-dsp-dump@0 {
	compatible = "sprd,audio_dsp_log";
	sprd-usemem-type =<0x5>;
	sprd-dst = /bits/ 8 <1>;
	sprd-channel =/bits/ 8 <4>;
	sprd-rxblocknum=<0x8>;
	sprd-rxblocksize=<0x2000>;
};
