west: sign: rimage: log("Prefixing with xman...") only when doing it

Fixes commit 2fdc551acc6af ("sign.py: stop ignoring the -- -c foo.toml
option passed to rimage")

Signed-off-by: Marc Herbert <marc.herbert@intel.com>
diff --git a/scripts/west_commands/sign.py b/scripts/west_commands/sign.py
index dfd25b1..c49a4de 100644
--- a/scripts/west_commands/sign.py
+++ b/scripts/west_commands/sign.py
@@ -454,6 +454,9 @@
 
         log.inf('Signing for SOC target ' + target + ' using ' + conf_path)
 
+        # FIXME: deprecate --no-manifest and replace it with a much
+        # simpler and more direct `-- -e` which the user can _already_
+        # pass today! With unclear consequences right now...
         if '--no-manifest' in args.tool_args:
             no_manifest = True
             args.tool_args.remove('--no-manifest')
@@ -485,8 +488,8 @@
             filenames = [out_bin]
         else:
             filenames = [out_xman, out_bin]
-        if not args.quiet:
-            log.inf('Prefixing ' + out_bin + ' with manifest ' + out_xman)
+            if not args.quiet:
+                log.inf('Prefixing ' + out_bin + ' with manifest ' + out_xman)
         with open(out_tmp, 'wb') as outfile:
             for fname in filenames:
                 with open(fname, 'rb') as infile: