The early initialization of the pci bus to node mapping leaves all busses
with a node id of -1 if it lacks memory affinity.  Thus, cpumask_of_pcibus
must return all online cpus for such busses.
Signed-off-by: NDavid Rientjes <rientjes@google.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>