[U-Boot] Veyron-speedy u-boot

[Riley Baird]

Hi Tomeu and Simon,

Thanks for giving me pointers on how the system works and how to get
u-boot onto it. I'll try and get it working over the next couple of
days.

I'm very glad that it's possible to chainload and the output comes out
on the laptop screen, because I got a spreadsheet to work out how much
it would cost to build a servo, and it was much more expensive than I
thought! :)

Thanks again,

Riley