ARM: dts: Add DT for Embedded Artists LPC4357 Developers Kit

Adds basic support for Embedded Artists' LPC4357 Developer's Kit. Board
features a LPC4357 Soc, 32 MB SDRAM, 128 MB NAND Flash, 16 MB SPI
Flash, USB and Ethernet.

More information can be found on:
http://www.embeddedartists.com/products/kits/lpc4357_kit.php



Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>