gitlab-ci: disable panfrost runners

They seem to be timing out.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4011>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4011>
1 file changed