ARM: dts: Add DT for Hitex LPC4350 Evaluation Board

Add basic support for Hitex LPC4350 Evaluation Board. Board
features a LPC4350 Soc, 8 MB SDRAM, 8 MB SPI Flash, USB and
Ethernet.

More information can be found on:
http://www.hitex.com/index.php?id=3212



Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@gmail.com>
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>