powerpc/pci: Don't add bogus empty resources to PHBs

When converting to use the new pci_add_resource_offset() we didn't
properly account for empty resources (0 flags) and add those bogons
to the PHBs. The result is some annoying messages in the log.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/pci-common.c

@@ -1540,13 +1540,17 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose,
 		res->flags = IORESOURCE_IO;
 #endif /* CONFIG_PPC32 */
 	}
-
+	if (res->flags) {
 		pr_debug("PCI: PHB IO resource    = %016llx-%016llx [%lx]\n",
 			 (unsigned long long)res->start,
 			 (unsigned long long)res->end,
 			 (unsigned long)res->flags);
 		pci_add_resource_offset(resources, res, pcibios_io_space_offset(hose));
 
+		pr_debug("PCI: PHB IO  offset     = %08lx\n",
+			 (unsigned long)hose->io_base_virt - _IO_BASE);
+	}
+
 	/* Hookup PHB Memory resources */
 	for (i = 0; i < 3; ++i) {
 		res = &hose->mem_resources[i];
@@ -1563,19 +1567,17 @@ static void pcibios_setup_phb_resources(struct pci_controller *hose,
 			res->flags = IORESOURCE_MEM;
 #endif /* CONFIG_PPC32 */
 		}
-
+		if (res->flags) {
 			pr_debug("PCI: PHB MEM resource %d = %016llx-%016llx [%lx]\n", i,
 				 (unsigned long long)res->start,
 				 (unsigned long long)res->end,
 				 (unsigned long)res->flags);
 			pci_add_resource_offset(resources, res, hose->pci_mem_offset);
 		}
+	}
 
 	pr_debug("PCI: PHB MEM offset     = %016llx\n",
 		 (unsigned long long)hose->pci_mem_offset);
-	pr_debug("PCI: PHB IO  offset     = %08lx\n",
-		 (unsigned long)hose->io_base_virt - _IO_BASE);
-
 }
 
 /*