ARM: dts: exynos: Add exynos3250-artik5 dtsi file for ARTIK5 module

This patch adds the Device Tree source for Samsung ARTIK5 module[1]
based on Exynos3250 SoC. The ARTIK5 module includes the following
devices:
 - Application Processor (Samsung Exynos3250)
 - WiFi/BT Combo chip (Broadcom4354)
 - PMIC (Samsung S2MPS14)
 - eMMC (4GB)
 - DRAM LPDDR3 (512MB)
 - Connectors pin (60 Pins x 3 set)

Also, this patch adds the ARTIK5 evaluation board[2] dts file which includes
the ARTIK5 module[1] and have the devices such as sound codec, sd card port,
ethernet port, uart port and so on.

[1] https://www.artik.io/hardware/artik-5
[2] http://www.digikey.com/product-search/en?FV=ffecca14

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

arch/arm/boot/dts/exynos3250-artik5-eval.dts

@@ -0,0 +1,26 @@
+/*
+ * Samsung's Exynos3250 based ARTIK5 evaluation board device tree source
+ *
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Device tree source file for Samsung's ARTIK5 evaluation board
+ * which is based on Samsung Exynos3250 SoC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/dts-v1/;
+#include "exynos3250-artik5.dtsi"
+
+/ {
+	model = "Samsung ARTIK5 evaluation board";
+	compatible = "samsung,artik5-eval", "samsung,artik5",
+			"samsung,exynos3250", "samsung,exynos3";
+};
+
+&serial_2 {
+	status = "okay";
+};