I've ported sunxi's Wi-Fi driver, fixed a bug there and added some quick hacks to integrate it into 12.0.2. Feel free to test, improve, and merge.
Support Wi-Fi on Orange Pi 3 LTS by void234 · Pull Request #10092 · LibreELEC/LibreELEC.tv
It is too HACKY to be merged and upstreamed "as is". Feel free to clean up.
The goal at the moment is to "create a usable image", not to merge or upstream.
github.com
It is NOT ready to be merged.