New comment by Hoshpak on void-packages repository

https://github.com/void-linux/void-packages/pull/11994#issuecomment-500817222
Comment:
Building kernel modules for cross-compiled architectures was fixed some time ago but only for the vanilla kernels. The rpi kernel packages probably need modifications similar to https://github.com/void-linux/void-packages/pull/8546.  If anyone got time for this (I currently don't unfortunately), you could give it a try and create a PR.