Commit caf5c03f (ACPI: Move acpi_bus_get_device() from bus.c to
scan.c) caused acpi_bus_get_device() to be exported using
EXPORT_SYMBOL_GPL(), but that broke some binary drivers in
existence, so revert that change.
Reported-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>