Fix: memleak/handling FTDI adapters

[lethalbit]

This PR fixes a memory leak in bmp_libusb and a bug in ftdi_bmp.

The former was a missing probe_info_list_free inside a failure case for FTDI lookups. The latter being a case where the ftdi_lookup_cable_by_product would erroneously return false if the cable was specified on the command line with -c resulting in an incorrect lookup failure.

Your checklist for this pull request

• I've read the Code of Conduct
• I've read the guidelines for contributing to this repository
• It builds for hardware native (make PROBE_HOST=native)
• It builds as BMDA (make PROBE_HOST=hosted)
• I've tested it to the best of my ability
• My commit messages provide a useful short description of what the commits do

Closing issues

[dragonmux]

LGTM, we'll merge as soon as the builds finish. Thank you for the contribution!