Correct comment to show the parameters as defined in tools/mkimage.h

Signed-off-by: Lars Rasmusson <Lars.Rasmusson@sics.se>
diff --git a/tools/fit_image.c b/tools/fit_image.c
index ef9ffee..76bbba1 100644
--- a/tools/fit_image.c
+++ b/tools/fit_image.c
@@ -80,7 +80,7 @@
 	}
 	sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
 
-	/* dtc -I dts -O -p 200 datafile > tmpfile */
+	/* dtc -I dts -O dtb -p 500 datafile > tmpfile */
 	sprintf (cmd, "%s %s %s > %s",
 		MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
 	debug ("Trying to execute \"%s\"\n", cmd);