powerpc/pci: Fix bogus message at boot about empty memory resources

The message is only meant to be displayed if resource 0 is empty,
but was displayed if any is.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/pci-common.c

@@ -1520,6 +1520,7 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose,
 	for (i = 0; i < 3; ++i) {
 		res = &hose->mem_resources[i];
 		if (!res->flags) {
+			if (i == 0)
 				printk(KERN_ERR "PCI: Memory resource 0 not set for "
 				       "host bridge %s (domain %d)\n",
 				       hose->dn->full_name, hose->global_number);