[PATCH 0/3] PReP support

Here is a string of three patches which make a first cut at supporting
PReP machines under arch/powerpc.  The first two are, I think, ready
for merge.  The third, well, up to you whether we ought to do the
numerous necessary cleanups before or after merge.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson