Crypto: Add secp384r1 test vectors for ECDSA

Add 269 test cases for ECDSA signature verification for the
SECP384R1 curve taken from the Wycheproof test vectors. As
this test requires additionally more than 35KB of flash,
make it buildable only from NS and with a dedicated config
option.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I22596d18d54d262dc9856f78ae5140475e4fa673
8 files changed