Contrary to what the original commit said, this is actually still used
(see .gitlab-ci/bare-metal/poe-powered.sh:205), and the boot retry logic
has been broken ever since, exacerbating the rpi farm boot problems.
Fixes: 97b2afa16a ("ci/bare-metal: Drop the 2 vs 1 exit code from poe_run.")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30340>