Make OSS_GETVERSION ioctl supported also for DSP devices, same as 4Front and Linux do.
Make OSS_GETVERSION ioctl supported also for DSP devices,
same as 4Front and Linux do.

MFC after:	1 month

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