turnip: allow writes to draw_cs outside of render pass

turnip: allow writes to draw_cs outside of render pass

This is for state commands like CmdSetViewport that can be used outside of
a renderpass. Accumulating those into draw_cs outside of the renderpass
should have the desired effect.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Eric Anholt <eric@anholt.net>