[ACPI] fix reboot upon suspend-to-disk

http://bugzilla.kernel.org/show_bug.cgi?id=4320



Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Acked-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Len Brown <len.brown@intel.com>