New review comment by JamiKettunen on void-packages repository

https://github.com/void-linux/void-packages/pull/31435#discussion_r672492418

Comment:
Matches the `linux-firmware` directory name and is already done the same way on e.g. [Alpine Linux](https://pkgs.alpinelinux.org/packages?name=linux-firmware-qcom); I can change it however if that's more approperiate in your opinion :)