RISC-V: use vector hardware AES instead of scalar

[SChernykh]

Scalar extensions are not recommended by the official RISC-V documentation:

The scalar crypto extensions Zkn and Zks that were options in RVA22 are not options in RVA23. The goal is for both hardware and software vendors to move to use vector crypto, as vectors are now mandatory and vector crypto is substantially faster than scalar crypto