sound broken on pinetab

In #1541 (comment 972869341) it was described that sound for the pine64-pinetab is broken. Filling this issue out from what's reported there (I don't have a pinetab) and assigning the device maintainers.

Describe your issue

What's the expected behaviour?

Sound working ;)

What's the current behaviour?

Sound: Is broken, ALSA UCM?

How to reproduce your issue?

What device are you using?

pine64-pinetab

On what postmarketOS version did you encounter the issue?

• edge (master branch)
• v21.12
• v22.06

On what environment did you encounter the issue?

Phone environments

• Phosh

How did you get postmarketOS image?

• I built it using pmbootstrap

What's the build date of the image? (in yyyy-mm-dd format)

2022-06-06

Additional information