Introduce {server,bankd}_conn_send_rspro()

Change-Id: I8cae6f67567dcbf4b6d62fb5a76f5b7134b16f5d
diff --git a/src/simtrace2-remsim_client.c b/src/simtrace2-remsim_client.c
index f46b7e6..e9568fa 100644
--- a/src/simtrace2-remsim_client.c
+++ b/src/simtrace2-remsim_client.c
@@ -632,7 +632,7 @@
 		osmo_fsm_inst_dispatch(g_client->bankd_fi, BDC_E_ESTABLISH, NULL);
 		/* send response to server */
 		resp = rspro_gen_ConfigClientRes(ResultCode_ok);
-		ipa_client_conn_send_rspro(srvc->conn, resp);
+		server_conn_send_rspro(srvc, resp);
 		break;
 	default:
 		fprintf(stderr, "Unknown/Unsupported RSPRO PDU type: %u\n", pdu->msg.present);