RT5651 audio CODEC

This device supports I2C only.

Required properties:

- compatible : "realtek,rt5651".

- reg : The I2C address of the device.

Optional properties:

- realtek,in2-differential
  Boolean. Indicate MIC2 input are differential, rather than single-ended.

- realtek,dmic-en
  Boolean. true if dmic is used.

Pins on the device (for linking into audio routes) for RT5651:

  * DMIC L1
  * DMIC R1
  * IN1P
  * IN2P
  * IN2N
  * IN3P
  * HPOL
  * HPOR
  * LOUTL
  * LOUTR
  * PDML
  * PDMR

Example:

codec: rt5651@1a {
	compatible = "realtek,rt5651";
	reg = <0x1a>;
	realtek,dmic-en = "true";
	realtek,in2-diff = "false";
};