Add defconfigs for LPC3250 boards

ea3250: Embedded Artists
http://www.embeddedartists.com/products/kits/lpc3250_kit.php

fdi3250: Future Designs Inc.
http://www.teamfdi.com/development-tools-kits/products/6/SOMDIMM-LPC3250

phy3250: Phytec
http://www.phytec.com/products/som/ARM-XScale/phyCORE-ARM9-LPC3250.html



Signed-off-by: Alexandre Belloni <abelloni@adeneo-embedded.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>