vulkan/wsi/display: add option for display fence to signal syncobj
To avoid having a separate "wsi_fence" path in the driver, make it so wsi fences can signal a syncobj.
Used by turnip in !6683 (merged)
To avoid having a separate "wsi_fence" path in the driver, make it so wsi fences can signal a syncobj.
Used by turnip in !6683 (merged)