patman: Tidy up a few more unicode conversions

Use the new functions in the tools module to handle conversion.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/gitutil.py b/tools/patman/gitutil.py
index fb9e67c..dce7fa2 100644
--- a/tools/patman/gitutil.py
+++ b/tools/patman/gitutil.py
@@ -412,9 +412,7 @@
     if smtp_server:
         cmd.append('--smtp-server=%s' % smtp_server)
     if in_reply_to:
-        if type(in_reply_to) != str:
-            in_reply_to = in_reply_to.encode('utf-8')
-        cmd.append('--in-reply-to="%s"' % in_reply_to)
+        cmd.append('--in-reply-to="%s"' % tools.FromUnicode(in_reply_to))
     if thread:
         cmd.append('--thread')
 
diff --git a/tools/patman/series.py b/tools/patman/series.py
index bbb30d8..67103f0 100644
--- a/tools/patman/series.py
+++ b/tools/patman/series.py
@@ -239,7 +239,7 @@
             for x in set(cc) & set(settings.bounces):
                 print(col.Color(col.YELLOW, 'Skipping "%s"' % x))
             cc = set(cc) - set(settings.bounces)
-            cc = [m.encode('utf-8') if type(m) != str else m for m in cc]
+            cc = [tools.FromUnicode(m) for m in cc]
             if limit is not None:
                 cc = cc[:limit]
             all_ccs += cc
@@ -248,8 +248,7 @@
 
         if cover_fname:
             cover_cc = gitutil.BuildEmailList(self.get('cover_cc', ''))
-            cover_cc = [m.encode('utf-8') if type(m) != str else m
-                        for m in cover_cc]
+            cover_cc = [tools.FromUnicode(m) for m in cover_cc]
             cc_list = ', '.join([tools.ToUnicode(x)
                                  for x in sorted(set(cover_cc + all_ccs))])
             print(cover_fname, cc_list.encode('utf-8'), file=fd)