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

https://github.com/ericonr/void-packages mesa-vc4-armv6l
https://github.com/void-linux/void-packages/pull/20888

mesa-dri: enable vc4 driver for armv6l
Related to #20861 

A patch file from https://github.com/void-linux/void-packages/pull/20888.patch is attached