patman: Pass the alias dict into gitutil.email_patches()

Rather than accessing the settings module in this function, require the
alias dict to be passed in.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/func_test.py b/tools/patman/func_test.py
index eee20b9..b96bf7b 100644
--- a/tools/patman/func_test.py
+++ b/tools/patman/func_test.py
@@ -230,13 +230,14 @@
         dry_run = True
         in_reply_to = mel
         count = 2
-        settings.alias = {
+        alias = {
             'fdt': ['simon'],
             'u-boot': ['u-boot@lists.denx.de'],
             'simon': [self.leb],
             'fred': [self.fred],
             'joe': [self.joe],
         }
+        settings.alias = alias
 
         text = self._get_text('test01.txt')
         series = patchstream.get_metadata_for_test(text)
@@ -255,7 +256,7 @@
                                         None, get_maintainer_script)
             cmd = gitutil.email_patches(
                 series, cover_fname, args, dry_run, not ignore_bad_tags,
-                cc_file, in_reply_to=in_reply_to, thread=None)
+                cc_file, alias, in_reply_to=in_reply_to, thread=None)
             series.ShowActions(args, cmd, process_tags)
         cc_lines = open(cc_file, encoding='utf-8').read().splitlines()
         os.remove(cc_file)