Add AMCC Redwood reference board that uses the latest
PPC 464 CPU processor combined with a rich mix of peripheral
controllers. The board will support PCIe, mutiple Gig ethernet
ports, advanced hardware RAID assistance and IEEE 1588.
Signed-off-by: NFeng Kan <fkan@amcc.com>
Signed-off-by: NStefan Roese <sr@denx.de>