gitlab-ci: re-enable all a630 jobs

gitlab-ci: re-enable all a630 jobs

I haven't noticed tftp boot issues in last few days, not sure if they
where just a fluke on Mon or if it is somehow related to # of jobs we
run (ie. having more of the c630 runners powered up and running more
of the time).

Let's turn them back on and see what happens.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5952>