dts: zynq: Add basic fdt support

This patch provides a basic fdt support for zynq u-boot.

zynq-7000.dtsi-> initial arch dts file
zynq-zed.dts -> initial zed board dts file
more devices should be added in subsequent patches.

u-boot build: once configuring of a board done
for building dtb with zynq-zed.dts as an input
zynq-uboot> make DEVICE_TREE=zynq-zed

Enabled CONFIG_OF_SEPARATE for building dtb separately.
There is a new binary called u-boot-dtb.bin which is a u-boot
with devicetree supported.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
diff --git a/board/xilinx/dts/zynq-zed.dts b/board/xilinx/dts/zynq-zed.dts
new file mode 100644
index 0000000..91a5deb
--- /dev/null
+++ b/board/xilinx/dts/zynq-zed.dts
@@ -0,0 +1,14 @@
+/*
+ * Xilinx ZED board DTS
+ *
+ * Copyright (C) 2013 Xilinx, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+/dts-v1/;
+#include "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq ZED Board";
+	compatible = "xlnx,zynq-zed", "xlnx,zynq-7000";
+};