PCI: replace struct pci_bus secondary/subordinate with busn_res

Replace the struct pci_bus secondary/subordinate members with the
struct resource busn_res.  Later we'll build a resource tree of these
bus numbers.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index fdaf218..c85bfd7 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -535,7 +535,7 @@
 	}
 
 	bus->primary = dev->bus->number;
-	bus->subordinate = busrange[1];
+	bus->busn_res.end = busrange[1];
 	bus->bridge_ctl = 0;
 
 	/* parse ranges property, or cook one up by hand for Simba */
@@ -693,8 +693,8 @@
 		pci_free_resource_list(&resources);
 		return NULL;
 	}
-	bus->secondary = pbm->pci_first_busno;
-	bus->subordinate = pbm->pci_last_busno;
+	bus->busn_res.start = pbm->pci_first_busno;
+	bus->busn_res.end = pbm->pci_last_busno;
 
 	pci_of_scan_bus(pbm, node, bus);
 	pci_bus_add_devices(bus);