PPC64 is failing to boot the latest mmotm due to an uninitialised pointer in
pci_create_legacy_files(). The surprise is that machines boot at all and it
would appear to affect current mainline as well.  This patch fixes the problem.
Signed-off-by: NMel Gorman <mel@csn.ul.ie>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>