zink: export PIPE_CAP_MAX*_VARYINGS values

this is separate from PIPE_SHADER_CAP_MAX_OUTPUTS

fixes mesa/mesa#3105

Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7110>
1 file changed