ACPI / hotplug / PCI: Don't trim devices before scanning the namespace

In acpiphp_bus_add() we first remove device objects corresponding to
the given handle and the ACPI namespace branch below it, which are
then re-created by acpi_bus_scan().  This used to be done to clean
up after surprise removals, but now we do the cleanup through
trim_stale_devices() which checks if the devices in question are
actually gone before removing them, so the device hierarchy trimming
in acpiphp_bus_add() is not necessary any more and, moreover, it may
lead to problems if it removes device objects corresponding to
devices that are actually present.

For this reason, remove the leftover acpiphp_bus_trim() from
acpiphp_bus_add().
Reported-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/pci/hotplug/acpiphp_glue.c

@@ -487,7 +487,6 @@ static void acpiphp_bus_add(acpi_handle handle)
 {
 	struct acpi_device *adev = NULL;
 
-	acpiphp_bus_trim(handle);
 	acpi_bus_scan(handle);
 	acpi_bus_get_device(handle, &adev);
 	if (adev)