usb: Fix goto to wrong label
usb: Fix goto to wrong label

The jump to the cleanup epilog pointed to the wrong label, which caused
the libusb context to never be freed on error.

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

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