radv: Don't use FLAT_SHADE for constants.

Setting both offset to 0x20 and flat shade results in passthrough
mode instead of the constant.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Fixes: f205e19e4f8 "radv/ac: eliminate unused vertex shader outputs. (v2)"
1 file changed