[U-Boot] Transferring images quickly with no Ethernet

[Rishi Dhupar]

I have an embedded system with an OMAP3 that does not have an Ethernet
support.  The only means of I/O to the process it is serial and USB
slave.  Loading binary data over the serial line is just too slow; is
there any way to the USB slave to perform bulk transfers to speed my
development process up?  It does not look the U-Boot supports USB
Ethernet gadget which is what I am using in Linux.