Add header file for reboot type to fix this build failure:

 error: 'reboot_type' undeclared (first use in this function)
 error: 'BOOT_KBD' undeclared (first use in this function)
Signed-off-by: Xiong Zhou <jencce.kernel@gmail.com>
Cc: rui.zhang@intel.com
Cc: alan@linux.intel.com
Cc: ffainelli@freebox.fr
Cc: mbizon@freebox.fr
Cc: matthew.garrett@nebula.com
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1307091053280.28371@M2420Signed-off-by: Ingo Molnar <mingo@kernel.org>