There is a new pull request by q66 against master on the void-packages repository

https://github.com/void-ppc/void-packages b43-fw
https://github.com/void-linux/void-packages/pull/22160

New package: b43-firmware, b43-firmware-classic
These are restricted templates (proprietary, non-redistributable) for broadcom b43 series wireless hardware (used in various laptops etc., notably Apple PowerPC and early Intel, but also others)

I haven't been able to find the license text.

Based on the Arch pkgbuilds and Gentoo ebuild.

A patch file from https://github.com/void-linux/void-packages/pull/22160.patch is attached