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>

arch/arm/boot/dts/zynq-cc108.dts

@@ -12,8 +12,8 @@
 /include/ "zynq-7000.dtsi"
 
 / {
+	model = "Xilinx CC108 board";
 	compatible = "xlnx,zynq-cc108", "xlnx,zynq-7000";
-	model = "Xilinx Zynq";
 
 	aliases {
 		ethernet0 = &gem0;