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>
diff --git a/common/image-fit.c b/common/image-fit.c
index c86b7c6..8a0ca2a 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -1483,6 +1483,10 @@
 	if (uname)
 		printf("%s  FDT:          %s\n", p, uname);
 
+	uname = (char *)fdt_getprop(fit, noffset, FIT_FPGA_PROP, NULL);
+	if (uname)
+		printf("%s  FPGA:         %s\n", p, uname);
+
 	/* Print out all of the specified loadables */
 	for (loadables_index = 0;
 	     fdt_get_string_index(fit, noffset,