software/fpga: fix bus interleaver
software/fpga: add FTDI TX/RX to LED mux

	- LED1/2 can now show FTDI TX/RX (respectively), MUX=2
software/fpga: add LFSR-based random traffic generator

	- Traffic generator for FTDI burn-in / throughput testing
software/host: multi-stream demux and parsing

	- Add support for demultiplexing multiple streams from
	  the OV. This allows in-band IO read/write completions
	  along with streaming data.

	- Add a basic LFSR-based stream test for BW / loss testing