patman: Pass in maintainer dirs to avoid and import

Adjust the get_maintainer module to accept a list of directories to search
for the script. This avoids needing to import gitutil.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Stefan Bosch <stefan_b@posteo.net>
diff --git a/tools/patman/series.py b/tools/patman/series.py
index ca7ca55..b7eef37 100644
--- a/tools/patman/series.py
+++ b/tools/patman/series.py
@@ -263,7 +263,8 @@
             if type(add_maintainers) == type(cc):
                 cc += add_maintainers
             elif add_maintainers:
-                cc += get_maintainer.GetMaintainer(commit.patch)
+                dir_list = [os.path.join(gitutil.GetTopLevel(), 'scripts')]
+                cc += get_maintainer.GetMaintainer(dir_list, commit.patch)
             for x in set(cc) & set(settings.bounces):
                 print(col.Color(col.YELLOW, 'Skipping "%s"' % x))
             cc = set(cc) - set(settings.bounces)