ts_31_102: Support for DF_MCS (Mission Critical Services)

Change-Id: I0485a14c7820f7b345eeba6109a93b6d4bc639bf
diff --git a/pySim/ts_51_011.py b/pySim/ts_51_011.py
index b2a9ca4..362d484 100644
--- a/pySim/ts_51_011.py
+++ b/pySim/ts_51_011.py
@@ -32,7 +32,7 @@
 from pySim.profile import match_sim
 from pySim.profile import CardProfile
 from pySim.filesystem import *
-from pySim.ts_31_102_telecom import DF_PHONEBOOK, DF_MULTIMEDIA
+from pySim.ts_31_102_telecom import DF_PHONEBOOK, DF_MULTIMEDIA, DF_MCS
 import enum
 from pySim.construct import *
 from construct import Optional as COptional
@@ -500,8 +500,8 @@
             EF_CMI(),
             # not really part of 51.011 but something that TS 31.102 specifies may exist here.
             DF_PHONEBOOK(),
-            # not really part of 51.011 but something that TS 31.102 specifies may exist here.
             DF_MULTIMEDIA(),
+            DF_MCS(),
         ]
         self.add_files(files)