We're reporting 2048 for VkPhysicalDeviceLimits::maxImageArrayLayers on
Turnip, so we should be able to use 2048 for OpenGL as well. And that's
the minimum required value for OpenGL 4.1 support.
According to http://vulkan.gpuinfo.org/, it seems like values of 2048
should be possible for at least as low as some Adreno 4xx GPUs. But
since we don't support recent GL versions on those, we this won't make a
big difference. So let's leave that up to someone who actually knows
what they're doing!
Acked-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19780>