Add UMTS AKA related MM/GMM message type and IE definitions

Change-Id: Id45ea2c631ee589a4df1f8213da6f7e7d1bf6616
Reviewed-on: https://gerrit.osmocom.org/305
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Tested-by: Jenkins Builder
diff --git a/include/osmocom/gsm/protocol/gsm_04_08.h b/include/osmocom/gsm/protocol/gsm_04_08.h
index 0c2fcf2..074c258 100644
--- a/include/osmocom/gsm/protocol/gsm_04_08.h
+++ b/include/osmocom/gsm/protocol/gsm_04_08.h
@@ -1272,6 +1272,7 @@
 
 /* Additional MM elements */
 #define GSM48_IE_LOCATION_AREA	0x13
+#define GSM48_IE_AUTN		0x20
 #define GSM48_IE_PRIORITY_LEV	0x80
 #define GSM48_IE_FOLLOW_ON_PROC	0xa1
 #define GSM48_IE_CTS_PERMISSION	0xa2