Introduce {server,bankd}_conn_send_rspro()

Change-Id: I8cae6f67567dcbf4b6d62fb5a76f5b7134b16f5d
diff --git a/src/client.h b/src/client.h
index 5756190..dae53a2 100644
--- a/src/client.h
+++ b/src/client.h
@@ -36,6 +36,6 @@
 	struct osmo_fsm_inst *bankd_fi;
 };
 
-void ipa_client_conn_send_rspro(struct ipa_client_conn *ipa, RsproPDU_t *rspro);
+int bankd_conn_send_rspro(struct bankd_client *bc, RsproPDU_t *pdu);
 int bankd_read_cb(struct ipa_client_conn *conn, struct msgb *msg);
 int bankd_conn_fsm_alloc(struct bankd_client *bc);