Having two top-level headings in an article confuses Sphinx, and makes
both appear as separate articles in the toc-tree.
It doesn't seem like there's a good reason why the following headings
should be nested under the "Turnip"-heading anyway, so let's just make
it a sibling to the "Hardware architecture" heading.
Acked-by: Rob Clark <robclark@freedesktop.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21948>
details.
Turnip
-======
+------
Turnip is a Vulkan 1.3 driver for Adreno 6xx GPUs.