c2570055d5
The colorspace SRGB_NONLINEAR could be added twice when querying
available formats, leading to duplicate entries and VulkanCTS WSI test
failures.
Fixes: 789507c99c ("vulkan/wsi: implement the Wayland color management protocol")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34410>