[prim/keccak] Keccak permutation logic Keccak permutation function and its round constants generator script. This commit implements a round of Keccak_f or Keccak_p that Round is less than the 12 + 2*L. It doesn't support the round greater than the given value (12 + 2*L) as Round Constant array doesn't have negative round value. Details are in [FIPS PUB 202][sha3] [sha3]: https://csrc.nist.gov/publications/detail/fips/202/final The Round Constant is generated by `hw/ip/prim/util/keccak_rc.py`. It follows the rc(t) function (Algorithm 5) in [FIPS PUB 202][sha3] specification. Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
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