Currently we don't enable it on any chip by default, but
we plan to enable it soon on GFX10.3 when we are comfortable
with its performance.
RADV_PERFTEST=nggc environment variable enables it on GFX10+ GPUs.
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10525>