Freescale i.MX audio complex with WM8960 codec

Required properties:

  - compatible		: "fsl,imx-audio-wm8960", "fsl,imx7d-evk-wm8960"

  - model		: The user-visible name of this sound complex

  - cpu-dai		: The phandle of CPU DAI

  - audio-codec		: The phandle of the WM8960 audio codec

  - audio-routing	: A list of the connections between audio components.
			  Each entry is a pair of strings, the first being the
			  connection's sink, the second being the connection's
			  source. Valid names could be power supplies, WM8960
			  pins, and the jacks on the board:

			  Power supplies:
			   * Mic Bias

			  Board connectors:
			   * Mic Jack
			   * Headphone Jack
			   * Ext Spk

Optional properties:
- hp-det-gpios : The gpio pin to detect plug in/out event that happens to
  Headphone jack.
- mic-det-gpios: The gpio pin to detect plug in/out event that happens to
  Microphone jack.

Example:

	sound: sound {
		compatible = "fsl,imx7d-evk-wm8960",
			   "fsl,imx-audio-wm8960";
		model = "wm8960-audio";
		cpu-dai = <&sai1>;
		audio-codec = <&wm8960>;
		codec-master;
		/*
		 * hp-det = <hp-det-pin hp-det-polarity>;
		 * hp-det-pin: JD1 JD2  or JD3
		 * hp-det-polarity = 0: hp detect high for headphone
		 * hp-det-polarity = 1: hp detect high for speaker
		 */
		hp-det = <2 0>;
		hp-det-gpios = <&gpio1 0 0>;
		mic-det-gpios = <&gpio1 0 0>;
		audio-routing =
			"Headphone Jack", "HP_L",
			"Headphone Jack", "HP_R",
			"Ext Spk", "SPK_LP",
			"Ext Spk", "SPK_LN",
			"Ext Spk", "SPK_RP",
			"Ext Spk", "SPK_RN",
			"LINPUT2", "Mic Jack",
			"LINPUT3", "Mic Jack",
			"RINPUT1", "Main MIC",
			"RINPUT2", "Main MIC",
			"Mic Jack", "MICB",
			"Main MIC", "MICB",
			"CPU-Playback", "ASRC-Playback",
			"Playback", "CPU-Playback",
			"ASRC-Capture", "CPU-Capture",
			"CPU-Capture", "Capture";
	};