There is an updated pull request by cinerea0 against master on the void-packages repository

https://github.com/cinerea0/void-packages sof
https://github.com/void-linux/void-packages/pull/26003

sof-firmware: update to 1.6
In addition to updating this package to version 1.6, this commit incorporates unmerged fixes proposed in #24776 and #24271. It also fixes a distfile error regarding pulling from a branch vs pulling from a commit. I would have pinned the distfile to a release tag, but unfortunately the sof-firmware project does not yet use those, though they are aware of the problem as shown by https://github.com/thesofproject/sof-bin/issues/21.

Closes #24776
Closes #24271

A patch file from https://github.com/void-linux/void-packages/pull/26003.patch is attached