ARM: zynq: Align model name with DT

Use model property to distinguish different configurations.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynq-cse-qspi-single.dts

@@ -7,6 +7,10 @@
 
 #include "zynq-cse-qspi.dtsi"
 
+/ {
+	model = "Zynq CSE QSPI SINGLE Board";
+};
+
 &flash0 {
 	spi-rx-bus-width = <4>;
 };