slave_only: use slave_only per-port variable instead of Def Dataset slaveOnly

Default Dataset slaveOnly variable is global and cannot be used in multilink
context

Signed-off-by: Aurelio Colosimo <aurelio@aureliocolosimo.it>

proto-standard/common-fun.c

@@ -47,7 +47,7 @@ int st_com_execute_slave(struct pp_instance *ppi)
 	if (pp_timeout_z(ppi, PP_TO_ANN_RECEIPT)) {
 		ppi->frgn_rec_num = 0;
 		ppi->frgn_rec_i = 0;
-		if (!DSDEF(ppi)->slaveOnly &&
+		if (!ppi->slave_only &&
 			DSDEF(ppi)->clockQuality.clockClass != 255) {
 			m1(ppi);
 			ppi->next_state = PPS_MASTER;

proto-standard/state-master.c

@@ -94,7 +94,7 @@ int pp_master(struct pp_instance *ppi, unsigned char *pkt, int plen)
 
 out:
 	if (e == 0) {
-		if (DSDEF(ppi)->slaveOnly ||
+		if (ppi->slave_only ||
 			DSDEF(ppi)->clockQuality.clockClass == 255)
 			ppi->next_state = PPS_LISTENING;
 	} else {