The package has a debian/watch file, but the last attempt
to use it for checking for newer upstream versions failed with
an error:
In debian/watch no matching files for watch line https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/ .*/trusted-firmware-a-(?:[-_]?[Vv]?(\d[\-+\.:\~\da-zA-Z]*)).tar.gz