* Spreadtrum cpu dai driver

This dai for voice call

Required properties:

- compatible : "sprd,vaudio"
- clocks : the tuned clock node that need to wwitch for voice call
- clock-names : the clock name that need to switch for voice call

Example:
This dai for voice call and witch the 26M tuned clock for voice call
&vaudio {
	clocks = <&clk_audio_gate 8>;
	clock-names = "tuned_26m";
};
