qseecom: New cmd to support ike encoding

A new command is needed to support enc / dec in IKE

Change-Id: I55aa5f7ae8d92393dc5090a351b95d2c48bd7a79
Acked-by: Nikita Agarwal <nikita@qti.qualcomm.com>
Signed-off-by: Zhen Kong <zkong@codeaurora.org>