rockchip — rt5645，rt5650 dts配置
1、属性值设置：
- compatible: 设置成："rockchip,rockchip-audio-rt5645" - rockchip,model: 给声卡设置名称 - rockchip,i2s-controller: 设置与codec连接的I2S通道； - rockchip,audio-codec: 设置音频codec，rt5645/rt5650.
2、实例：
Example:
sound {
compatible = "rockchip,rockchip-audio-rt5645";
rockchip,model = "ROCKCHIP-I2S";
rockchip,i2s-controller = <&i2s>;
rockchip,audio-codec = <&rt5645>;
};