Rather than using the first available interface on the first available
device, we now have a "simtrace2-list" program that lists all compatible
interfaces on all configurations of all devices on the system
We now auto-discover the end-point addresses based on the interface
descriptor. The user can also use the new "--interface" command line
argument to set a non-zero intrerface. In combination, this should
enable support for the remote-sim functionality on the second UART
on OWHW.
