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>

arch/arm/boot/dts/Makefile

@@ -211,7 +211,8 @@ dtb-$(CONFIG_ARCH_SUNXI) += \
 	sun4i-a10-mini-xplus.dtb \
 	sun4i-a10-hackberry.dtb \
 	sun5i-a10s-olinuxino-micro.dtb \
-	sun5i-a13-olinuxino.dtb
+	sun5i-a13-olinuxino.dtb \
+	sun6i-a31-colombus.dtb
 dtb-$(CONFIG_ARCH_TEGRA) += tegra20-harmony.dtb \
 	tegra20-iris-512.dtb \
 	tegra20-medcom-wide.dtb \

arch/arm/boot/dts/sun6i-a31-colombus.dts

+/*
+ * Copyright 2013 Maxime Ripard
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/dts-v1/;
+/include/ "sun6i-a31.dtsi"
+
+/ {
+	model = "WITS A31 Colombus Evaluation Board";
+	compatible = "wits,colombus", "allwinner,sun6i-a31";
+
+	chosen {
+		bootargs = "earlyprintk console=ttyS0,115200";
+	};
+
+	soc@01c00000 {
+		uart0: serial@01c28000 {
+			status = "okay";
+		};
+	};
+};