Add runtime pm support to audio protocol device class driver.
Testing Done:
- Use white speaker module and check the interface is autosuspended when
it's idle and resumed when playback audio
Signed-off-by: David Lin <dtwlin@google.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Reviewed-by: Vaibhav Agarwal <vaibhav.agarwal@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>