HSD #1509644685 crypto: intel_fcs: Generic Mailbox Command

commit d031779b1e0a2ecec3bf7ce8a5602e92a5013b4d from
https://github.com/altera-opensource/linux-socfpga.git



Add generic mailbox command that can support SDM command. User can use this
command to send SDM mailbox command. User have to specified an input file
which contain the command data and an output file for SDM response to be
copied over.

Signed-off-by: Teh, Wen Ping <wen.ping.teh@intel.com>
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>