Remove sioX as an alias for uartX. It is believed to be more confusing than helpful.
Remove sioX as an alias for uartX. It is believed to be
more confusing than helpful.

Suggested by: jhb

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase