Add the PnP ID for a Rockwell 33.6k modem.
Add the PnP ID for a Rockwell 33.6k modem.

PR:		kern/23414
Submitted by:	Ryuichiro Imura <imura@af.airnet.ne.jp>
MFC after:	1 week

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