Crypto: Remove const from API declarations

The keyword const has no effect on API declarations and should
be removed for clarity. Keep it only on the API definition so
that a correct behaviour on the implementation can be enforced
through the compiler.

Signed-off-by: Antonio de Angelis <antonio.deangelis@arm.com>
Change-Id: I93935dfeee7b27e40869e0212cf65eb131f961a3
1 file changed