maybe such patches will be actual for current branch
https://github.com/LibreELEC/LibreELEC.tv/tree/2eb49f99ba20a7055939a8064a68d9ad27acd9d8/packages/linux-drivers/RTL8812AU/patches
https://github.com/LibreELEC/LibreELEC.tv/tree/2eb49f99ba20a7055939a8064a68d9ad27acd9d8/packages/linux-drivers/RTL8812AU/patches