mkimage: Report information about fpga

Add FIT_FPGA_PROP that user can identify an optional
entry for fpga.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

doc/uImage.FIT/multi-with-fpga.its

@@ -0,0 +1,67 @@
+/*
+ * U-Boot uImage source file with multiple kernels, ramdisks and FDT blobs
+ * This example makes use of the 'loadables' field
+ */
+
+/dts-v1/;
+
+/ {
+	description = "Configuration to load fpga before Kernel";
+	#address-cells = <1>;
+
+	images {
+		fdt@1 {
+			description = "zc706";
+			data = /incbin/("/tftpboot/devicetree.dtb");
+			type = "flat_dt";
+			arch = "arm";
+			compression = "none";
+			load = <0x10000000>;
+			hash@1 {
+				algo = "md5";
+			};
+		};
+
+		fpga@1 {
+			description = "FPGA";
+			data = /incbin/("/tftpboot/download.bit");
+			type = "fpga";
+			arch = "arm";
+			compression = "none";
+			load = <0x30000000>;
+			hash@1 {
+				algo = "md5";
+			};
+		};
+
+		linux_kernel@1 {
+			description = "Linux";
+			data = /incbin/("/tftpboot/zImage");
+			type = "kernel";
+			arch = "arm";
+			os = "linux";
+			compression = "none";
+			load = <0x8000>;
+			entry = <0x8000>;
+			hash@1 {
+				algo = "md5";
+			};
+		};
+	};
+
+	configurations {
+		default = "config@2";
+		config@1 {
+			description = "Linux";
+			kernel = "linux_kernel@1";
+			fdt = "fdt@1";
+		};
+
+		config@2 {
+			description = "Linux with fpga";
+			kernel = "linux_kernel@1";
+			fdt = "fdt@1";
+			fpga = "fpga@1";
+		};
+	};
+};