This patch restores the original behaviour of prep_pcibios_fixup() to only
call prep_pib_init() on machines with an openpic.  This allows the
Powerstack II Pro4000 to boot again.
Signed-off-by: Leigh Brown <leigh@solinno.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>