[AVR32] Board code for ATNGW100

Add board code and defconfig for the ATNGW100 Network Gateway kit.
For more information about this board, see

http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4102

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
diff --git a/arch/avr32/Makefile b/arch/avr32/Makefile
index 7b842e9..6115fc1 100644
--- a/arch/avr32/Makefile
+++ b/arch/avr32/Makefile
@@ -27,6 +27,7 @@
 head-y					+= arch/avr32/kernel/head.o
 core-$(CONFIG_PLATFORM_AT32AP)		+= arch/avr32/mach-at32ap/
 core-$(CONFIG_BOARD_ATSTK1000)		+= arch/avr32/boards/atstk1000/
+core-$(CONFIG_BOARD_ATNGW100)		+= arch/avr32/boards/atngw100/
 core-$(CONFIG_LOADER_U_BOOT)		+= arch/avr32/boot/u-boot/
 core-y					+= arch/avr32/kernel/
 core-y					+= arch/avr32/mm/