device_test: hotplug remove makes virt dev disco
device_test: hotplug remove makes virt dev disco

This allows the next controller to be plugged in to get the
virtual UI treatment.

Signed-off-by: Harry van Haaren <6e1296516ee88185cd60d9725251227ece1af74d@gmail.com>

openAVproductions/openAV-Ctlra