📢 [help wanted] implement RISC-V cryptography (sub-)extensions

[stnolting]

Help Wanted!

Now that we have some basic RISC-V cryptography ISA extension support (#1033), it would be great to also add support for the remaining sub-extensions.

• Zbkb - bit manipulation instructions for cryptography (✨ add support for RISC-V Zbkb ISA extension #1037)
• Zbkc - carry-less multiplications (✨ add support for RISC-V Zbkc ISA extension #1038)
• Zkn - shorthand for Zbkb + Zbkc + Zbkx + Zbkne + Zbknd + Zknh (Add Zkn ISA extension #1039)
• Zksed - ShangMi block cipher operations (✨ add support for RISC-V Zks* ISA extensions #1040)
• Zksh - ShangMi hash functions (✨ add support for RISC-V Zks* ISA extensions #1040)
• Zks - shorthand for Zbkb + Zbkc + Zbkx + Zksed + Zksh (✨ add support for RISC-V Zks* ISA extensions #1040)
• Zkt - data-independent execution latency (Add Zkt ISA extension #1036)
• Zkr - entropy source

Any kind of help is most welcome! :)