sccp init: pass no local m3ua addr to use defaults

Remove the FIXMEs because these addresses are configurable via the cs7 /
{as,asp} vty commands.

Change-Id: Ibafda0a9097183c26b21f3380d24dbe293e132e2
diff --git a/src/gprs/sgsn_main.c b/src/gprs/sgsn_main.c
index e24a57b..8ffc6c8 100644
--- a/src/gprs/sgsn_main.c
+++ b/src/gprs/sgsn_main.c
@@ -479,10 +479,9 @@
 #if BUILD_IU
 	sccp = osmo_sccp_simple_client(tall_bsc_ctx, "OsmoSGSN",
 				       2 /* FIXME: configurable */,
-				       OSMO_SS7_ASP_PROT_M3UA, 0,
-				       "127.0.0.4" /* FIXME: configurable */,
-				       M3UA_PORT,
-				       "127.0.0.1" /* FIXME: configurable */);
+				       OSMO_SS7_ASP_PROT_M3UA,
+				       0, NULL,
+				       0, "127.0.0.1");
 	if (!sccp) {
 		printf("Setting up SCCP client failed.\n");
 		return 8;