[U-Boot] rpi: Complete table of models with new revision code scheme

[Alexander Graf]

> In the model table for the new revision code encoding documented in
> https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
> add the entries for old models with the new scheme and add CM3 which
> only appears in the new scheme.
> 
> A device tree for CM3 is not currently upstreamed in linux.  When that
> happens the name will likely have to be adjusted in the table.
> 
> Signed-off-by: Jonathan Gray <jsg at jsg.id.au>

Thanks, applied to rpi-next

Alex