As we do not support stream output buffers we only count the primitives
processed by the pipeline. Use the correct query type.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Part-of: <!5754>