ARM: dts: zynq: correct and improve the model property of dt files

Replace the current value of the model property by a more accurate
description of each board (which includes the manufacturer), as some
of the boards had the same value ("Xilinx Zynq")

Signed-off-by: Luis Araneda <luaraneda@gmail.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/zynq-zed.dts b/arch/arm/dts/zynq-zed.dts
index c54515d..d2b7fc2 100644
--- a/arch/arm/dts/zynq-zed.dts
+++ b/arch/arm/dts/zynq-zed.dts
@@ -7,7 +7,7 @@
 #include "zynq-7000.dtsi"
 
 / {
-	model = "Zynq Zed Development Board";
+	model = "Avnet ZedBoard board";
 	compatible = "avnet,zynq-zed", "xlnx,zynq-zed", "xlnx,zynq-7000";
 
 	aliases {