Crypto: Add separate hash-verify to ECDSA test

Add a separate hashing + verify-hash flow to the ECDSA signature
test to be able to test independently these important APIs.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I47ce7a0afbae1ee28fea0384bc6e2e680a9b1d9e
1 file changed