kernel-hlte- Implement kexec-hardboot
"Allows hard booting (i.e., with a full hardware reboot) to a kernel previously loaded in memory by kexec.  This works around the problem of soft-booted kernel hangs due
to improper device shutdown and/or reinitialization."

Change-Id: I9b515c856a36aef0af15cdb4348c01e23760cae5