Send "BSSMAP CommonID" to tell BSC about the IMSI

We're already sending the RANAP CommonID message to the RNC,
let's do the same using BSSMAP CommonId towards the BSC.  This
way the BSC knows about the IMSI of the served subscriber, which
is very useful for logging/debugging.

Change-Id: I2552736477663adb250c55728093500e8ae83ebb
Closes: OS#2969
Depends: libosmocore.git I353adc1aa72377f7d4b3336d2ff47791fb73d62c
diff --git a/src/libvlr/vlr_lu_fsm.c b/src/libvlr/vlr_lu_fsm.c
index d5425e7..53e614d 100644
--- a/src/libvlr/vlr_lu_fsm.c
+++ b/src/libvlr/vlr_lu_fsm.c
@@ -818,18 +818,15 @@
 {
 	struct lu_fsm_priv *lfp = lu_fsm_fi_priv(fi);
 	struct vlr_subscr *vsub = lfp->vsub;
+	int rc;
 
 	LOGPFSM(fi, "%s()\n", __func__);
 
 	OSMO_ASSERT(vsub);
 
-	if (lfp->is_utran) {
-		int rc;
-		rc = lfp->vlr->ops.tx_common_id(lfp->msc_conn_ref);
-		if (rc)
-			LOGPFSML(fi, LOGL_ERROR,
-				 "Error while sending Common ID (%d)\n", rc);
-	}
+	rc = lfp->vlr->ops.tx_common_id(lfp->msc_conn_ref);
+	if (rc)
+		LOGPFSML(fi, LOGL_ERROR, "Error while sending Common ID (%d)\n", rc);
 
 	vsub->conf_by_radio_contact_ind = true;
 	/* Update LAI */