[mbed-tls] Question about contribution of AES hardware support for RISC-V

Dear Mbed TLS maintainers,

I have surveyed Mbed TLS and know that it has features which can improve AES block cipher performance by hardware instructions instead of SW implementation e.q., AESCE of ARMV8 and AESNI of INTEL.

AS far as I know about RISC-V Cryptography extension(Zkne and Zknd), it also supports relevant AES instructions which can accelerate aes key schedule, encryption and decryption process. (https://tools.cloudbear.ru/docs/riscv-crypto-spec-scalar-1.0.0-rc6-20211012....)

I want to ask for your opinions and agreement. Is there any willingness to accept this RISC-V accelerated feature idea and contribution to Mbed TLS ? If you agree with it, I would like to prepare a pull request for you to review.

Sincerely, Rick