The patch you are looking at is part of base armbian, it is not included in balbes150's arm-64 build. (The patch is from meson64-dev and you are building arm-64-dev). So even if the build did work, you wouldn't see the result you were looking for.
The build for arm-64-dev is currently pointing to the linux kernel next branch, which is in the midst of the open merge window ahead of 5.7, this code will be unstable for a while, that is likely the reason for the build failures you are seeing.
