Add CDDL definition of the crypto service access protocol

The added CDDL defines the service access protocol for a subset of
crypto operations. This forms a prototype for how CDDL can be used
to formally define a service interface.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: Iffa6b7bbbc4a588ab095d0f0320a7db3a2edbbee
2 files changed