Crypto: Amend Chacha20-Poly1305 related tests

* Support running Chacha20 in block cipher mode
* Extend RFC 7539 test vector verification to check single part
* Run RFC 7539 tests also in the Non Secure regression

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I251042d395e940f7a24a97320dc1bf3f1af83e6b
2 files changed