PCI: xgene: Remove leftover pci_scan_child_bus() call

commit 94b9d29 upstream.

The changes in commit 9af275b ("PCI: xgene: Convert PCI scan API to
pci_scan_root_bus_bridge()") converted the xgene PCI host driver to
the new pci_scan_root_bus_bridge() bus scanning API but erroneously left
the existing pci_scan_child_bus() call in place which resulted in duplicate
PCI bus enumerations.

Remove the leftover pci_scan_child_bus() call to properly complete the API
conversion.

Fixes: 9af275b ("PCI: xgene: Convert PCI scan API to pci_scan_root_bus_bridge()")
Tested-by: Khuong Dinh <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Cc: <[email protected]> # 4.13+
Cc: Bjorn Helgaas <[email protected]>
Cc: Tanmay Inamdar <[email protected]>
Signed-off-by: Sudip Mukherjee <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Lorenzo Pieralisi

drivers/pci/host/pci-xgene.c

@@ -686,7 +686,6 @@ static int xgene_pcie_probe_bridge(struct platform_device *pdev)
 
 	bus = bridge->bus;
 
-	pci_scan_child_bus(bus);
 	pci_assign_unassigned_bus_resources(bus);
 	list_for_each_entry(child, &bus->children, node)
 		pcie_bus_configure_settings(child);