mesa: merge 2 switch statements into one in _mesa_get_derived_vao_masks

_mesa_vao_enable_to_vp_inputs has a switch statement and we call it twice.
Let's inline it.

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19953>
1 file changed