[Review OP-TEE#4] Add small comment about smallprime product values

Minor comment.

Signed-off-by: Clement Faure <clement.faure@nxp.com>

core/drivers/crypto/caam/acipher/caam_prime.c

@@ -70,7 +70,7 @@ static const uint8_t sqrt_value[] = {
  * Speedups for prime searching
  *
  * These values are products of small primes.  Information about the product
- * preceeds it.
+ * preceeds it. These values have been pre-computed by the CAAM design team.
  *
  * Per Handbook of Applied Cryptography, Menezes et al, 4.4.1, one can compute
  * the percentage of non-primes weeded out by checking for small prime factors