BSSMAP log tweak

Before:
  RAN decode: BSSMAP: Rx BSSMAP DT1 COMPLETE LAYER 3
After:
  RAN decode: BSSMAP: COMPLETE LAYER 3

This caught my attention while I was writing up a script to parse osmo-msc
logging to produce ladder diagrams.

Change-Id: I387dde8f2eb3edb35d22ce52dc0ed580978dea36

src/libmsc/ran_msg_a.c

@@ -776,7 +776,7 @@ static int ran_a_decode_bssmap(struct ran_dec *ran_dec, struct msgb *bssmap)
 		return -EINVAL;
 	}
 
-	LOG_RAN_A_DEC(ran_dec, LOGL_DEBUG, "Rx BSSMAP DT1 %s\n", gsm0808_bssmap_name(msg_type));
+	LOG_RAN_A_DEC(ran_dec, LOGL_DEBUG, "%s\n", gsm0808_bssmap_name(msg_type));
 
 	switch (msg_type) {
 	case BSS_MAP_MSG_COMPLETE_LAYER_3: