ACPICA: cast length arguement to acpi_ns_build_normalized_path() as u32

ACPICA commit d216e4c8d886d7fb82697948c4fee8a5777a1a5a

Link: https://github.com/acpica/acpica/commit/d216e4c8


Signed-off-by: Sven Barth <sb@miray.de>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Kaneda <erik.kaneda@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>