Code review comment for ~alfonsosanchezbeato/ubuntu/+source/flash-kernel:kria-support

Oh wow, so this overall looks really good now; the only small thing that disturbs me a little bit is the whole dtb-install field / dtb-is use is just for that one board and related to the fact the its / fit generation requires the file to be copied to the tmpdir because it needs to be in the same dir; I don't know if there's an elegant way to avoid this forcing the creation of a new database field