gfxstream: Prune the wait/signal semaphore lists on queue submissions

For Linux guests, remove syncFd semaphores entirely, as they are waited
on/signaled using the guest-side syncFd operations, and coarse
queueWaits only.

Reviewed-by: Gurchetan Singh <gurchetansingh@google.com>
Reviewed-by: Marcin Radomski <dextero@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34751>
2 files changed