do not blindly assume 8khz is supported on open().  try for 8khz but respect minspeed/maxspeed specified by the hw driver.
do not blindly assume 8khz is supported on open().  try for 8khz but respect
minspeed/maxspeed specified by the hw driver.

Submitted by:	Andrew Gordon <arg@arg1.demon.co.uk>

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