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

https://github.com/matthias-t/void-packages wpa_supplicant-driver
https://github.com/void-linux/void-packages/pull/20972

wpa_supplicant: add DRIVER option to runit service
On old hardware were `wext` is needed, there should be a way to configure `wpa_supplicant` without resorting to setting all options manually through `OPTS`.

A patch file from https://github.com/void-linux/void-packages/pull/20972.patch is attached