arm: dts: zynq: Add digilent ZYBO board dts

It's a Zynq board similar in design to the currently supported ones.
512MB of RAM and UART1 is used.

Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Acked-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/Makefile

@@ -34,6 +34,7 @@ dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 dtb-$(CONFIG_ZYNQ) += zynq-zc702.dtb \
 	zynq-zc706.dtb \
 	zynq-zed.dtb \
+	zynq-zybo.dtb \
 	zynq-microzed.dtb \
 	zynq-zc770-xm010.dtb \
 	zynq-zc770-xm012.dtb \

arch/arm/dts/zynq-zybo.dts

+/*
+ * Digilent ZYBO board DTS
+ *
+ * Copyright (C) 2013 Xilinx, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+/dts-v1/;
+#include "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq ZYBO Board";
+	compatible = "xlnx,zynq-zybo", "xlnx,zynq-7000";
+
+	aliases {
+		serial0 = &uart1;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0 0x20000000>;
+	};
+};