feat(app/device_assignment): add helper dev_assign_hash_extend

Add wrapper routine to compute incremental hash for a data using
mbedtls PSA hash helpers.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: Ie1231d0ba91c80b92d089181999895be58fa60ad
3 files changed