cbfstool: Add region offset information to layout command

The layout command prints all FMAP regions in the final image among with
the region size. Extend this command to show the offset of each region
in the image.

Change-Id: I5f945ba046bd2f1cb50a93e90eb887f60c6fde8a
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/25851
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

util/cbfstool/cbfstool.c

@@ -930,7 +930,8 @@ static int cbfs_layout(void)
 			qualifier = "read-only, ";
 		else if (region_is_modern_cbfs((const char *)current->name))
 			qualifier = "CBFS, ";
-		printf(" (%ssize %u)\n", qualifier, current->size);
+		printf(" (%ssize %u, offset %u)\n", qualifier, current->size,
+				current->offset);
 
 		i += lookahead - 1;
 	}