Thank you chewitt and vlix for this thread... I had the exact same issue vlix did, and switching the dtb over to the beelink GT1 Ultimate version worked. my ethernet doesn't appear to work, but the wifi is working just fine.
My main goal for the old little GT1 was to participate in a docker swarm in my home hobby lab... for the life of me I could not get an Armbian build to boot. LibreElec is working great. Once I got Kodi working, configured networking, and then installed network / system tools, and then added the docker service. Since I no long need to use Kodi, will add ssh and textmode as a bootarg and system is good to go.
Again, thank you and LibreElec teams... your work on this project is very much appreciated.