The previous define was common for all panfrost code, but for Vulkan we should probably use the real hardware-limits. So let's introduce a GL-driver specific define here, and use that instead. This lets us change the other define to the real HW limitation. Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28417>