ASCI: Add message definition and encoding according to 3GPP TS 48.008

Change-Id: Ib94c64136c31ce4af67c314a8550d93946cc844f
diff --git a/include/osmocom/gsm/protocol/gsm_08_08.h b/include/osmocom/gsm/protocol/gsm_08_08.h
index fad75c2..967e4fe 100644
--- a/include/osmocom/gsm/protocol/gsm_08_08.h
+++ b/include/osmocom/gsm/protocol/gsm_08_08.h
@@ -168,12 +168,15 @@
 	BSS_MAP_MSG_VGCS_VBS_QUEUING_INDICATION	= 30,
 	BSS_MAP_MSG_UPLINK_RQST		= 31,
 	BSS_MAP_MSG_UPLINK_RQST_ACKNOWLEDGE	= 39,
+	BSS_MAP_MSG_VGCS_VBS_ASSIGNMENT_STATUS	= 59,
+	BSS_MAP_MSG_VGCS_VBS_AREA_CELL_INFO	= 60,
 	BSS_MAP_MSG_UPLINK_RQST_CONFIRMATION	= 73,
 	BSS_MAP_MSG_UPLINK_RELEASE_INDICATION	= 74,
 	BSS_MAP_MSG_UPLINK_REJECT_CMD	= 75,
 	BSS_MAP_MSG_UPLINK_RELEASE_CMD	= 76,
 	BSS_MAP_MSG_UPLINK_SEIZED_CMD	= 77,
 	BSS_MAP_MSG_VGCS_ADDL_INFO		= 0x60,
+	BSS_MAP_MSG_VGCS_SMS			= 0x61,
 	BSS_MAP_MSG_NOTIFICATION_DATA		= 0x62,
 	BSS_MAP_MSG_UPLINK_APP_DATA		= 0x63,