add BTS_FEAT_VAMOS

Change-Id: Ic3bd1b8075f76d1f35499faa68fad70698ee9a00
diff --git a/include/osmocom/gsm/bts_features.h b/include/osmocom/gsm/bts_features.h
index d0dbe48..ac2c760 100644
--- a/include/osmocom/gsm/bts_features.h
+++ b/include/osmocom/gsm/bts_features.h
@@ -28,6 +28,7 @@
 	BTS_FEAT_IPV6_NSVC,
 	BTS_FEAT_ACCH_REP,
 	BTS_FEAT_CCN, /* Is CCN supported by the cell? TS 44.060 sec 8.8.2 */
+	BTS_FEAT_VAMOS, /* Is the BTS VAMOS capable? */
 	_NUM_BTS_FEAT
 };
 
diff --git a/src/gsm/bts_features.c b/src/gsm/bts_features.c
index 1e15616..c3f3667 100644
--- a/src/gsm/bts_features.c
+++ b/src/gsm/bts_features.c
@@ -43,6 +43,7 @@
 	{ BTS_FEAT_IPV6_NSVC,		"NSVC IPv6" },
 	{ BTS_FEAT_ACCH_REP,		"FACCH/SACCH Repetition" },
 	{ BTS_FEAT_CCN,			"Cell Change Notification (CCN)" },
+	{ BTS_FEAT_VAMOS,		"VAMOS (Voice services over Adaptive Multi-user channels on One Slot)" },
 	{ 0, NULL }
 };