Add support for CP1610

[vhelin]

The instructions look like they could be easily added to WLA:

https://docs.google.com/spreadsheets/d/11ZjBfELBJxbAsCxFQfs5emx1h5qoApvKHMi_cxgEzI0/edit#gid=0

but jumps might need new code as the address there isn't a plain 16-bit word:

"Unconditional Jump Opcode Space: binary 0 000 000 100 ; bbppppppii ; pppppppppp"

All useful documents, please add to this thread. :)

[jeffythedragonslayer]

This looks official: http://www.avoidspikes.com/dsplib/chips/cp1610.pdf