radv/gfx10: fix NGG streamout with triangle strips for VS

The number of vertices has to be adjusted with the output primitive
type.

This fixes dEQP-VK.transform_feedback.simple.triangle_strip_*.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
40 jobs for !2007 with gfx10_ngg_streamout_fixes in 3 minutes and 27 seconds (queued for 3 seconds)
merge request