Marvell PXA SSP CPU DAI bindings

Required properties:

	compatible	Must be "mrvl,pxa-ssp-dai"
	port		A phandle reference to a PXA ssp upstream device

Example:

	/* upstream device */

	ssp1: ssp@41000000 {
		compatible = "mrvl,pxa3xx-ssp";
		reg = <0x41000000 0x40>;
		interrupts = <24>;
		clock-names = "pxa27x-ssp.0";
	};

	/* DAI as user */

	ssp_dai0: ssp_dai@0 {
		compatible = "mrvl,pxa-ssp-dai";
		port = <&ssp1>;
		#sound-dai-cells = <0>;
	};