arm: mvebu: Add Allied Telesis x240 board

The x240 and SE240 are a series of L2+ switches from Allied Telesis.
There are a number of them in the range but as far as U-Boot is
concerned all the CPU block components are the same so there's only one
board defined.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/board/alliedtelesis/x240/MAINTAINERS b/board/alliedtelesis/x240/MAINTAINERS
new file mode 100644
index 0000000..f1f78d9
--- /dev/null
+++ b/board/alliedtelesis/x240/MAINTAINERS
@@ -0,0 +1,7 @@
+X240 BOARD
+M:	Chris Packham <chris.packham@alliedtelesis.co.nz>
+S:	Maintained
+F:	board/alliedtelesis/x240/
+F:	arch/arm/dts/ac5-98dx35xx-rd.dts
+F:	include/configs/x240.h
+F:	configs/x240_defconfig