If --enable-maintainer-mode got lost from config.status for any reason,
builds would fail in mysterious ways after changing between different
There are more reasons for dropping it in the automake manual:
I'm not aware of any reason why --disable-maintainer-mode would ever be
useful with this project.
Reviewed-by: Alex Deucher <email@example.com>
(Cherry picked from radeon commit 49cf3b5032a7ce40afe514b7092440e3e19e05aa)