PCI: rcar: Use pci_host_probe() to register host

The rcar host driver does the same host registration and bus scanning
calls as pci_host_probe, so let's use it instead.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Yoshihiro Shimoda <[email protected]>
Cc: [email protected]

Author: robherring

drivers/pci/controller/pcie-rcar-host.c

@@ -330,8 +330,6 @@ static int rcar_pcie_enable(struct rcar_pcie_host *host)
 	struct pci_host_bridge *bridge = pci_host_bridge_from_priv(host);
 	struct rcar_pcie *pcie = &host->pcie;
 	struct device *dev = pcie->dev;
-	struct pci_bus *bus, *child;
-	int ret;
 
 	/* Try setting 5 GT/s link speed */
 	rcar_pcie_force_speedup(pcie);
@@ -349,21 +347,7 @@ static int rcar_pcie_enable(struct rcar_pcie_host *host)
 	if (IS_ENABLED(CONFIG_PCI_MSI))
 		bridge->msi = &host->msi.chip;
 
-	ret = pci_scan_root_bus_bridge(bridge);
-	if (ret < 0)
-		return ret;
-
-	bus = bridge->bus;
-
-	pci_bus_size_bridges(bus);
-	pci_bus_assign_resources(bus);
-
-	list_for_each_entry(child, &bus->children, node)
-		pcie_bus_configure_settings(child);
-
-	pci_bus_add_devices(bus);
-
-	return 0;
+	return pci_host_probe(bridge);
 }
 
 static int phy_wait_for_ack(struct rcar_pcie *pcie)