Create encrypted block store infrastructure

Create infrastructure with partitioned, encrypted ram for testing,
which contains an MbedTLS instance with minimized config that
enables only HKDF and AES with CBC and ECB.

Change-Id: Ie5a1ade885bb564976cf39f6bea4c3ce4aa59904
Signed-off-by: Gabor Toth <gabor.toth2@arm.com>
4 files changed