[Cryptech Tech] need SHA-224 support

[Rob Austein]

Just pushed update to sw/libhal which adds driver and test vectors for
SHA-224.  Unsurprisingly, Joachim's Verilog core passed these tests.

Was a little puzzled at the jump in the SHA-256 core's version number
(0.81 to 1.80), but, whatever, I don't claim to understand how people
decide what version numbers to use in the Verilog cores, nor do I
really care so long as they don't go backwards. :)