macsec_linux: Fix receive-lowest-PN setting

Setting of the PN for the receive SA failed because the SCI wasn't
provided. Fix this by adding the needed attribute to the command.

Signed-off-by: Ze Gan <ganze718@gmail.com>

src/drivers/driver_macsec_linux.c

@@ -712,6 +712,9 @@ static int macsec_drv_set_receive_lowest_pn(void *priv, struct receive_sa *sa)
 	if (!msg)
 		return ret;
 
+	if (nla_put_rxsc_config(msg, mka_sci_u64(&sa->sc->sci)))
+		goto nla_put_failure;
+
 	nest = nla_nest_start(msg, MACSEC_ATTR_SA_CONFIG);
 	if (!nest)
 		goto nla_put_failure;