ACPI / hotplug: Make acpi_bus_hot_remove_device() internal

Notice that handle_root_bridge_removal() is the only user of
acpi_bus_hot_remove_device(), so it doesn't have to be exported
any more and can be made internal to the ACPI core.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>

diff --cc drivers/acpi/internal.h
Simple merge

diff --cc drivers/acpi/pci_root.c
Simple merge

diff --cc drivers/acpi/scan.c
Simple merge

diff --cc include/acpi/acpi_bus.h
Simple merge