Emit all the state layout config (such as push-const CONSTLEN) first,
before emitting anything that depends on that state.  This fixes an
issue that was showing up when FLUT is enabled in ir3 (which results
in higher probability of not having any immediats lowered to push-
consts).

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <mesa/mesa!8705>