ARM: sun6i: Add Colombus board defconfig

The Colombus board is an A31 evaluation board from WITS Technology.

Maxime has kindly agreed to maintain this board.

[1] http://lists.denx.de/pipermail/u-boot/2014-September/190043.html

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 6c4226e..7afe45e 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -45,3 +45,8 @@
 S:	Maintained
 F:	board/sunxi/dram_a20_olinuxino_l2.c
 F:	configs/A20-OLinuXino-Lime2_defconfig
+
+COLOMBUS BOARD
+M:	Maxime Ripard <maxime.ripard@free-electrons.com>
+S:	Maintained
+F:	configs/Colombus_defconfig