If a sentinal is present, allow dfu-util to load a program directly to
RAM. This saves us the step of writing to flash.
Signed-off-by: Sean Cross <sean@xobs.io>
We're having issues getteing DFU working. It almost works, but has some
issues. Unfortunately, we're out of space for printf.
Now we will work to get the UART Wishbone bridge working, to move
forward on debugging support.
Signed-off-by: Sean Cross <sean@xobs.io>