yocto-opkg usb-update has been integrated into the oecore-opkg usb-update:
http://update.aizo.com/feeds/dss11-testing-eglibc/usb-update/dss11-testing-2018.I-test00.33-upgrade.zip

or simply use the latest one:

http://update.aizo.com/feeds/dss11-testing-eglibc/usb-update/dss11-testing-latest-upgrade.zip