✨ [cpu] add support for RISC-V scalar cryptography ISA extensions

[stnolting]

This PR adds a new CPU co-processor that implements parts of the RISC-V scalar cryptography ISA extension. The following sub-extensions are supported yet:

Zbkx - Crossbar Permutations

• xperm8 xperm4

Zknh - NIST Suite: Hash Functions

• sha256: sha256sig0 sha256sig1 sha256sum0 sha256sum1
• sha512: sha512sig0h sha512sig0l sha512sig1h sha512sig1l sha512sum0r sha512sum1r

Zknd & Zkne - NIST Suite: AES Decryption and Encryption

• decryption: aes32dsi aes32dsmi
• encryption: aes32esi aes32esmi

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Further RISC-V cryptographic ISA extension might be added in the future (-> #1034).