tests: voice: Add voice call test with Osmux enabled

Change-Id: Ie4f360a77f6fcbc74f140a7fcb5feef2d94ac734
diff --git a/suites/voice/mo_mt_call_osmux.py b/suites/voice/mo_mt_call_osmux.py
new file mode 100755
index 0000000..acf7d71
--- /dev/null
+++ b/suites/voice/mo_mt_call_osmux.py
@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+from osmo_gsm_tester.testenv import *
+
+import testlib
+suite.test_import_modules_register_for_cleanup(testlib)
+from testlib import test_mo_mt_call
+
+test_mo_mt_call(True, True)