Qualcomm WCD Codec SoundWire controller

Required properties:

 - compatible : should be "qcom,swr-wcd"
 - reg : Unique device ID(48 bits) of Soundwire slave device node.
	 In the below example, wsa881x is soundwire slave device for
	 which the swr-devid is <0x0 0x032000> where 0x03 represents
	 device Unique_ID, 0x20 represents Part_Id1 and 0x00
	 represents part_Id2.
- #address-cells = <2>;
- #size-cells = <0>;

Optional property:

 Example:
	swr_master {
		compatible = "qcom,swr-wcd";
		#address-cells = <2>;
		#size-cells = <0>;

		wsa881x@32000 {
			compatible = "qcom,wsa881x";
			reg = <0x00 0x032000>;
		};

		wsa881x@42000 {
			compatible = "qcom,wsa881x";
			reg = <0x00 0x042000>;
		};
	};