Catch up with PHK's sio(4) rework [sys/dev/sio/sio.c rev. 1.456].
Catch up with PHK's sio(4) rework [sys/dev/sio/sio.c rev. 1.456].

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