ARM: sun6i: Add WITS Colombus A31 evaluation kit support

This platform from WITS is the evaluation board for the Allwinner A31.
It features a quad-Cortex A7, 2048MB of RAM, NAND, USB, MMC, several
UART, HDMI, a 2048 x 1536 10" screen, powered by a PowerVR, etc.

Of course, most of these peripherals aren't supported yet, but support
for those will come eventually.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 3fd3919..09a614d 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -211,7 +211,8 @@
 	sun4i-a10-mini-xplus.dtb \
 	sun4i-a10-hackberry.dtb \
 	sun5i-a10s-olinuxino-micro.dtb \
-	sun5i-a13-olinuxino.dtb
+	sun5i-a13-olinuxino.dtb \
+	sun6i-a31-colombus.dtb
 dtb-$(CONFIG_ARCH_TEGRA) += tegra20-harmony.dtb \
 	tegra20-iris-512.dtb \
 	tegra20-medcom-wide.dtb \