I don't believe this dtb has ever existed in any armbian build. All references I see to it (via web search) are from non-armbian builds. The dtb isn't in the mainline kernel and thus not in the armbian builds.
You could try other meson-sm1-* dtbs that do exist and see if any work for your box, or you could grab a dtb from elsewhere and try it with your armbian build (note you will need a dtb compatible with mainline linux, not one for an android linux).