Sameeh Jubran 2571eb16ff Only use usbdk when installed
Check UsbDK availability at run time and activate UsbDk backend when
possible.

Fall back to current behavior when UsbDK not installed.

Signed-off-by: Dmitry Fleytman <dfleytma@...>
Signed-off-by: Sameeh Jubran <sameeh@...>
2017-02-10 13:12:41 +01:00
..
2017-02-10 13:12:41 +01:00