migration/multifd: Cleanup multifd_load_cleanup() Use similar logic to cleanup the recv side. Note that multifd_recv_terminate_threads() may need some similar rework like the sender side, but let's leave that for later. Reviewed-by: Fabiano Rosas <farosas@suse.de> Link: https://lore.kernel.org/r/20240202102857.110210-21-peterx@redhat.com Signed-off-by: Peter Xu <peterx@redhat.com>