Fix some typos in stdout output

Change-Id: I0dbb438f3bfbaf9744717cbeec31ceefdd679ee9
Related: OS#1694
diff --git a/openbsc/src/libmsc/smpp_smsc.c b/openbsc/src/libmsc/smpp_smsc.c
index ef4277a..e537490 100644
--- a/openbsc/src/libmsc/smpp_smsc.c
+++ b/openbsc/src/libmsc/smpp_smsc.c
@@ -756,7 +756,7 @@
 	case QUERY_SM:
 	case REPLACE_SM:
 	case SUBMIT_MULTI:
-		LOGP(DSMPP, LOGL_NOTICE, "[%s] Unimplemented PDU Commmand "
+		LOGP(DSMPP, LOGL_NOTICE, "[%s] Unimplemented PDU Command "
 		     "0x%08x\n", esme->system_id, cmd_id);
 		break;
 	default: