freedreno: Wait for imported syncobj fences to be available

Waiting on a fence created from an imported syncobj needs wait for the
fence_fd to become available

Fixes piglit tests added in https://gitlab.freedesktop.org/mesa/piglit/-/merge_requests/992

Fixes the following issue for freedreno: #12650

Cc: mesa-stable
Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33724>
1 file changed