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>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 52f8926..8977d4b 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -34,6 +34,7 @@
 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 \