Add support for ezsound 6x8 soundcard #6563
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Summarising previous discussion for the record:
This is a new multichannel soundcard for the Pi5.
Some pcm3168a driver customisation is necessary to override a limitiation in ASoC. Hopefully, this limitation will be addressed in the next LTS kernel, at which point the customisations will no longer be needed.
The relevant modules need to be enabled in bcm2712_defconfig and DT overlays provided.
Technical details on ASoC limitation:
scenario
limitation