WM1811/WM8994/WM8958 audio CODEC

These devices support both I2C and SPI (configured with pin strapping
on the board).

Required properties:

  - compatible : "wlf,wm1811", "wlf,wm8994", "wlf,wm8958"

  - reg : the I2C address of the device for I2C, the chip select
          number for SPI.

Example:

codec: wm8994@1a {
	compatible = "wlf,wm8994";
	reg = <0x1a>;
};
