Add Chameleon v3 ASoC audio

Merge series from Paweł Anikiel <pan@semihalf.com>:

The Google Chameleon v3 is a device made for testing audio and video
paths of other devices. This patchset adds support for ASoC audio on
this device. It has two audio sources: HDMI audio from the it68051 chip
(RX only), and analog audio from the ssm2603 chip (RX and TX).

The patchset adds the ASoC platform and codec drivers.