QCA I2S1 DAI module

Required properties:
- compatible : "qca,ipq40xx-i2s1"
- dma-tx-channel : Specify the MBOX TX channel number for I2S1.
- stereo-tx-port : Specify the Stereo port id for I2S1.

Example:

i2s1: ipq40xx-pcm-i2s1@0 {
	compatible = "qca,ipq40xx-i2s1";
	dma-tx-channel = <MBOX1_TX_ID>;
	stereo-tx-port = <STEREO1_ID>;
};
