Use new e1inp_signal_names from libosmo-abis to print input signal names

Change-Id: I156027ecdd1456228c9f8776577edd48e70c19da
diff --git a/openbsc/src/libbsc/bsc_init.c b/openbsc/src/libbsc/bsc_init.c
index 50c73db..520b2e2 100644
--- a/openbsc/src/libbsc/bsc_init.c
+++ b/openbsc/src/libbsc/bsc_init.c
@@ -324,9 +324,10 @@
 	if (subsys != SS_L_INPUT)
 		return -EINVAL;
 
+	LOGP(DLMI, LOGL_DEBUG, "%s(): Input signal '%s' received\n", __func__,
+		get_value_string(e1inp_signal_names, signal));
 	switch (signal) {
 	case S_L_INP_TEI_UP:
-		LOGP(DLMI, LOGL_DEBUG, "%s() signal: S_L_INP_TEI_UP\n", __func__);
 		if (isd->link_type == E1INP_SIGN_OML) {
 			/* TODO: this is required for the Nokia BTS, hopping is configured
 			   during OML, other MA is not set.  */
@@ -351,7 +352,6 @@
 			bootstrap_rsl(trx);
 		break;
 	case S_L_INP_TEI_DN:
-		LOGP(DLMI, LOGL_DEBUG, "%s() signal: S_L_INP_TEI_DN\n", __func__);
 		LOGP(DLMI, LOGL_ERROR, "Lost some E1 TEI link: %d %p\n", isd->link_type, trx);
 
 		if (isd->link_type == E1INP_SIGN_OML)