sparc/PCI: Claim bus resources before pci_bus_add_devices()

Pci_claim_bus_resources() should be called before pci_bus_add_devices(), or
driver may failed to load, because the resources had not claimed.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

arch/sparc/kernel/pci.c

@@ -677,11 +677,10 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm,
 	}
 
 	pci_of_scan_bus(pbm, node, bus);
-	pci_bus_add_devices(bus);
 	pci_bus_register_of_sysfs(bus);
 
 	pci_claim_bus_resources(bus);
-
+	pci_bus_add_devices(bus);
 	return bus;
 }