radv: fix pipeline statistics end query on compute queue

It's legal to a pipeline stat query on a compute queue,
but we'd emit the wrong packet here. This should fix it to emit
the correct packet.

Noticed while inspecting the mpv hang.

Fixes: ad61eac2 (radv: factor out eop event writing code. (v2))
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit ec1edd0f)