Patch by me (Ian Abbott).  Removed aliases of FTDI_VID define for
consistency.  Renamed FTDI_PERLE_PID to FTDI_PERLE_ULTRAPORT_PID.
Removed Matrix Orbital and Perle Systems devices from the 8U232AM
device table (but left them in the FT232BM device table) as they
are known to be FT232BM devices.