Added qemu toolchain and created zynq ps targets

Signed-off-by: Joppe Blondel <joppe@blondel.nl>

examples/zynq7000/SW/devicetree/system-top.dts

@@ -0,0 +1,25 @@
+/*
+ * CAUTION: This file is automatically generated by Xilinx.
+ * Version: XSCT 2020.2
+ * Today is: Wed Oct 13 14:26:41 2021
+ */
+
+
+/dts-v1/;
+#include "zynq-7000.dtsi"
+#include "zynq-pl-remoteport.dtsi"
+//#include "pl.dtsi"
+#include "pcw.dtsi"
+/ {
+	chosen {
+		bootargs = "earlycon";
+		stdout-path = "serial0:115200n8";
+	};
+	aliases {
+		serial0 = &uart1;
+	};
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x20000000>;
+	};
+};