MediaTek mt7620n and UDC

Hello guys. I need that on the device(nexx 3020f) with the processor MediaTek mt7620n usb worked in device mode. All I could find is this old patch: 0162-USB-MIPS-ralink-add-rt5350-mt7620-UDC.patch
There may be a way to make LEDE work in this usb device mode on the specified processor?
Many thanks.

Adron, I'm trying to do the same thing, I don't like how openwrt 15 failsafe doesn't work on wt3020f. You have any success with this?