Add hints for uart(4). These are the same as for sio(4) and make it easier to switch from sio(4) to uart(4).
Add hints for uart(4). These are the same as for sio(4) and make it
easier to switch from sio(4) to uart(4).

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