ports.h: rename CSCN to MSC

See OS#1958

Change-Id: I85aee0f8fdfc9c69d0ba9240988c633d3e707f2d
diff --git a/include/osmocom/vty/ports.h b/include/osmocom/vty/ports.h
index 70dc69c..887e4df 100644
--- a/include/osmocom/vty/ports.h
+++ b/include/osmocom/vty/ports.h
@@ -20,7 +20,7 @@
 /* 4249-4251 used by control interface */
 #define OSMO_VTY_PORT_BTSMGR	4252
 #define OSMO_VTY_PORT_GTPHUB	4253
-#define OSMO_VTY_PORT_CSCN	4254
+#define OSMO_VTY_PORT_MSC	4254
 /* 4255 used by control interface */
 #define OSMO_VTY_PORT_MNCC_SIP	4256
 /* 4257 used by control interface */