This turns grub-emu into a port in order to make it easier to port GRUB to
new CPUs.  A porter can then do the CPU port without having to worry about
firmware and/or hardware drivers initially.

Patch attached.  Branch is available in
bzr+ssh://bzr.savannah.gnu.org/grub/people/robertmh/grub-emu/

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."