radv/winsys: always allow GTT placements on APUs
When the VRAM size is small and the preferred heap only VRAM,
the kernel tries to always honor the requested heap and it does
a ton of evictions which is a disaster for performance.
On APUs, VRAM and GTT have similar performance, so allow the
kernel to choose the best placement (GTT or VRAM) itself.
This gives a huge performance boost with Doom Eternal on RAVEN.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5665>
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