Audio Codecs.

Driver for the TI PCM3060 Audio Codec.

Ak4556 Codec support.

Author: shensley

I don't see any real reason to have this be more than a function, but in case we want to add other functions down the road I wrapped the function in a class.

For now this is a limited interface that uses I2C to communicate with the PCM3060 The device can also be accessed with SPI, which is not yet supported.

For now all registers are set to their defaults, and the Init function will perform a MRST and SRST before setting the format to 24bit LJ, and disabling power save for both the ADC and DAC.