PCI: altera: Use pci_host_probe() to register host

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

The only difference is pci_assign_unassigned_bus_resources() was called
instead of pci_bus_size_bridges() and pci_bus_assign_resources(). This
should be the same.

Link: https://lore.kernel.org/r/20200522234832.954484-11-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: rfi@lists.rocketboards.org

drivers/pci/controller/pcie-altera.c

@@ -773,8 +773,6 @@ static int altera_pcie_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct altera_pcie *pcie;
-	struct pci_bus *bus;
-	struct pci_bus *child;
 	struct pci_host_bridge *bridge;
 	int ret;
 	const struct of_device_id *match;
@@ -825,20 +823,7 @@ static int altera_pcie_probe(struct platform_device *pdev)
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
-	ret = pci_scan_root_bus_bridge(bridge);
-	if (ret < 0)
-		return ret;
-
-	bus = bridge->bus;
-
-	pci_assign_unassigned_bus_resources(bus);
-
-	/* Configure PCI Express setting. */
-	list_for_each_entry(child, &bus->children, node)
-		pcie_bus_configure_settings(child);
-
-	pci_bus_add_devices(bus);
-	return ret;
+	return pci_host_probe(bridge);
 }
 
 static int altera_pcie_remove(struct platform_device *pdev)