GitLab

Instead of linking directly to the Freedreno wiki, let's link to the
driver docs, and then put a link to the Freedreno wiki there.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <mesa/mesa!11109>