ARM: add SBx81LIFKW board

This is a series of line cards for Allied Telesis's SBx8100 chassis
switch. The CPU block is common to the SBx81GS24a, SBx81XS6, SBx81XS16
and SBx81GT40 cards collectively referred to as SBx81LIFKW in u-boot.

Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/alliedtelesis/SBx81LIFKW/Makefile b/board/alliedtelesis/SBx81LIFKW/Makefile
new file mode 100644
index 0000000..806020e
--- /dev/null
+++ b/board/alliedtelesis/SBx81LIFKW/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2010, 2018
+# Allied Telesis <www.alliedtelesis.com>
+#
+
+obj-y	+= sbx81lifkw.o