Fix: Nokia requires VTY's "oml e1" parameters also

When writing config file, OML configuration must be written for all
E1 based BTS, which includes Nokia *Site BTS.
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index e0ccfaf..0066719 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -601,7 +601,7 @@
 		break;
 	case GSM_BTS_TYPE_NOKIA_SITE:
 		vty_out(vty, "  nokia_site skip-reset %d%s", bts->nokia.skip_reset, VTY_NEWLINE);
-		break;
+		/* fall through: Nokia requires "oml e1" parameters also */
 	default:
 		config_write_e1_link(vty, &bts->oml_e1_link, "  oml ");
 		vty_out(vty, "  oml e1 tei %u%s", bts->oml_tei, VTY_NEWLINE);