Waiting for 0.5 secs and expecting that the requests have been completed
is... bad. Fix the test case by using cam.read_event() as a blocking
wait, and wait until we have received all the requests that we queued.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>