net: lan966x: Remove setting of RX software timestamp

The responsibility for reporting of RX software timestamp has moved to
the core layer (see __ethtool_get_ts_info()), remove usage from the
device drivers.
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c

@@ -549,16 +549,13 @@ static int lan966x_get_ts_info(struct net_device *dev,
 
 	phc = &lan966x->phc[LAN966X_PHC_PORT];
 
-	info->phc_index = phc->clock ? ptp_clock_index(phc->clock) : -1;
-	if (info->phc_index == -1) {
-		info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
-					 SOF_TIMESTAMPING_RX_SOFTWARE |
-					 SOF_TIMESTAMPING_SOFTWARE;
+	if (phc->clock) {
+		info->phc_index = ptp_clock_index(phc->clock);
+	} else {
+		info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE;
 		return 0;
 	}
 	info->so_timestamping |= SOF_TIMESTAMPING_TX_SOFTWARE |
-				 SOF_TIMESTAMPING_RX_SOFTWARE |
-				 SOF_TIMESTAMPING_SOFTWARE |
 				 SOF_TIMESTAMPING_TX_HARDWARE |
 				 SOF_TIMESTAMPING_RX_HARDWARE |
 				 SOF_TIMESTAMPING_RAW_HARDWARE;