When we have a multi-socket system, each CPU core needs the same setup.
Since this is tricky to do in the fixup code, don't enable a 64bit BAR on
multi-socket systems for now.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>