Let's get rid of Quectel's audio codec#4

Merged

Biktorgj merged 12 commits intolinux-3.18.140from

audio_playground

Mar 22, 2022

Commits on Mar 12, 2022

Reenable serial port (testing)
Biktorgj
committed

Commits on Mar 13, 2022

TESTING: Don't fail with -EBUSY if we get to suspend while OTG state is suspend (seems to introduce problems when userspace suspends and a remote wakeup is issued)
Biktorgj
committed

Commits on Mar 19, 2022

RT5616: Add more debugging to know where we're at, force sync volumes when preparing bias
Biktorgj
committed

Commits on Mar 21, 2022