[MIPS] PCI: Set need_domain_info if controller domain index is non-zero.

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: NRalf Baechle <ralf@linux-mips.org>

arch/mips/pci/pci.c

@@ -141,6 +141,7 @@ static int __init pcibios_init(void)
 
 		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;