
OpenGL 3.0 requires RGTC support, and until we have emulation in place,
we should document that requirement.
Fixes: d50e8554b9
("zink: add feature-documentation")
Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18549>