Initial version of Support for Nokia *Site BTS

This includes the MetroSite, but also other Nokia BTS models.
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index ff01224..b0bfeca 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -1634,6 +1634,7 @@
 		break;
 	case GSM_BTS_TYPE_BS11:
 	case GSM_BTS_TYPE_RBS2000:
+	case GSM_BTS_TYPE_NOKIA_SITE:
 		trau_mux_map_lchan(lchan, remote_lchan);
 		break;
 	default: