udev: Only scan the requested USB device
udev: Only scan the requested USB device

Instead of scanning all USB devices everytime a new device is plugged,
which might disrupt the functionality of the unrelated devices being
scanned, only scan for the USB device we are interested in, since we
know its VID/PID.

Signed-off-by: Paul Cercueil <a027184a55211cd23e3f3094f1fdc728df5e0500@crapouillou.net>

analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio,analogdevicesinc/libiio