soc-qcom-sdm845: apply workaround for working audio on PipeWire

Out of the box audio is really quiet and distorted on the axolotl when using PipeWire. This can be worked around by forcing audio to 16 bits (which PulseAudio uses by default and thus works). This seems to be a kernel problem and should be fixed properly there but for now we can apply this workaround to at least be able to switch to PipeWire anytime soon. The actual workaround is applied by Wireplumber so the dependency for the subpackage is set to that.

Contributes to #1534 (closed)