This fixes this little funny:
bigsur:/proc/bus/pci# ls -l
total 0
dr-xr-xr-x    2 root     root            0 Aug 28 19:31 00
dr-xr-xr-x    2 root     root            0 Aug 28 19:31 00
dr-xr-xr-x    2 root     root            0 Aug 28 19:31 01
dr-xr-xr-x    2 root     root            0 Aug 28 19:31 03
-r--r--r--    1 root     root            0 Aug 28 19:31 devices
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 
                bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
                hose->bus = bus;
+               need_domain_info = need_domain_info || hose->index;
                hose->need_domain_info = need_domain_info;
                if (bus) {
                        next_busno = bus->subordinate + 1;