[U-Boot] USB DFU support into mailline.

Hi,

Referring to http://elinux.org/Merge_DFU_support_into_mainline_U-Boot, it seems some work is going on for adding USB DFU support in the mainline for u-boot. But I could not find any code already in mainline. Is there anyone working on getting USB DFU support to mainline?

I am working on USB DFU on AM335x BeagleBone, and I want help get USB DFU to mainline.

Thanks, Harman