patman: Look for checkpatch in the scripts directory

The Linux kernel stores checkpatch.pl in the scripts directory.  Add
that to the search path to make things more automatic for kernel
development.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/checkpatch.py b/tools/patman/checkpatch.py
index d831087..f72f8ee 100644
--- a/tools/patman/checkpatch.py
+++ b/tools/patman/checkpatch.py
@@ -26,10 +26,12 @@
 import terminal
 
 def FindCheckPatch():
+    top_level = gitutil.GetTopLevel()
     try_list = [
         os.getcwd(),
         os.path.join(os.getcwd(), '..', '..'),
-        os.path.join(gitutil.GetTopLevel(), 'tools'),
+        os.path.join(top_level, 'tools'),
+        os.path.join(top_level, 'scripts'),
         '%s/bin' % os.getenv('HOME'),
         ]
     # Look in current dir