PCI: Make pci_register_host_bridge() PCI core internal

With the introduction of pci_scan_root_bus_bridge() there is no need to
export pci_register_host_bridge() to other kernel subsystems other than the
PCI compilation unit that needs it.

Make pci_register_host_bridge() static to its compilation unit and convert
the existing drivers usage over to pci_scan_root_bus_bridge().

Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>

drivers/pci/host/pci-ftpci100.c

···
 		return ret;
 
 	list_splice_init(&res, &host->windows);
-	ret = pci_register_host_bridge(host);
+	ret = pci_scan_root_bus_bridge(host);
 	if (ret) {
-		dev_err(dev, "failed to register host: %d\n", ret);
+		dev_err(dev, "failed to scan host: %d\n", ret);
 		return ret;
 	}
 	p->bus = host->bus;
 
-	pci_scan_child_bus(p->bus);
 	pci_fixup_irqs(pci_common_swizzle, of_irq_parse_and_map_pci);
 	pci_bus_assign_resources(p->bus);
 	pci_bus_add_devices(p->bus);

drivers/pci/host/pci-tegra.c

···
 	host->dev.parent = &pdev->dev;
 	host->ops = &tegra_pcie_ops;
 
-	err = pci_register_host_bridge(host);
+	err = pci_scan_root_bus_bridge(host);
 	if (err < 0) {
 		dev_err(dev, "failed to register host: %d\n", err);
 		goto disable_msi;
 	}
-
-	pci_scan_child_bus(host->bus);
 
 	pci_fixup_irqs(pci_common_swizzle, tegra_pcie_map_irq);
 	pci_bus_size_bridges(host->bus);

drivers/pci/probe.c

···
 	dev_set_msi_domain(&bus->dev, d);
 }
 
-int pci_register_host_bridge(struct pci_host_bridge *bridge)
+static int pci_register_host_bridge(struct pci_host_bridge *bridge)
 {
 	struct device *parent = bridge->dev.parent;
 	struct resource_entry *window, *n;
···
 	kfree(bus);
 	return err;
 }
-EXPORT_SYMBOL(pci_register_host_bridge);
 
 static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
 					   struct pci_dev *bridge, int busnr)

include/linux/pci.h

···
 struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
 						   size_t priv);
 void pci_free_host_bridge(struct pci_host_bridge *bridge);
-int pci_register_host_bridge(struct pci_host_bridge *bridge);
 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
 
 void pci_set_host_bridge_release(struct pci_host_bridge *bridge,