patman: Allow specifying the patchwork URL

Add a new argument to allow the URL of the patchwork server to be
speciified. For now this is hard-coded in the main file, but future
patches will move it to the settings file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/main.py b/tools/patman/main.py
index e0e03a4..5f319ea 100755
--- a/tools/patman/main.py
+++ b/tools/patman/main.py
@@ -179,7 +179,8 @@
     try:
         control.patchwork_status(args.branch, args.count, args.start, args.end,
                                  args.dest_branch, args.force,
-                                 args.show_comments)
+                                 args.show_comments,
+                                 'https://patchwork.ozlabs.org')
     except Exception as e:
         terminal.Print('patman: %s: %s' % (type(e).__name__, e),
                        colour=terminal.Color.RED)