Catch up to latest tty, kdb and SYSINIT changes.  Modeled after the dev/ofw changes, since this driver appears to have used that as a start years ago...
Catch up to latest tty, kdb and SYSINIT changes.  Modeled after the
dev/ofw changes, since this driver appears to have used that as a
start years ago...

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