There is a new pull request by mvf against master on the void-packages repository

https://github.com/mvf/void-packages pr/bbswitch
https://github.com/void-linux/void-packages/pull/23681

bbswitch: fix build with kernel 5.6+
Been running this for a few months on 5.6.8. Also build-tested against 5.7.9.

A patch file from https://github.com/void-linux/void-packages/pull/23681.patch is attached