lan743x: 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>
Reviewed-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/microchip/lan743x_ethtool.c

@@ -1034,16 +1034,12 @@ static int lan743x_ethtool_get_ts_info(struct net_device *netdev,
 	struct lan743x_adapter *adapter = netdev_priv(netdev);
 
 	ts_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;
 
 	if (adapter->ptp.ptp_clock)
 		ts_info->phc_index = ptp_clock_index(adapter->ptp.ptp_clock);
-	else
-		ts_info->phc_index = -1;
 
 	ts_info->tx_types = BIT(HWTSTAMP_TX_OFF) |
 			    BIT(HWTSTAMP_TX_ON) |