radv: add tessellation ring allocation support. (v2)

This patch adds support for the offchip rings for storing
tessellation factors and attribute data.

It includes the register setup for the TF ring

v2: always do tess ring size calcs (Bas)

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
3 files changed