sfc: 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: Martin Habets <habetsm.xilinx@gmail.com>
Link: https://patch.msgid.link/20240906144632.404651-13-gal@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/sfc/ethtool.c

@@ -230,11 +230,6 @@ static int efx_ethtool_get_ts_info(struct net_device *net_dev,
 {
 	struct efx_nic *efx = efx_netdev_priv(net_dev);
 
-	/* Software capabilities */
-	ts_info->so_timestamping = (SOF_TIMESTAMPING_RX_SOFTWARE |
-				    SOF_TIMESTAMPING_SOFTWARE);
-	ts_info->phc_index = -1;
-
 	efx_ptp_get_ts_info(efx, ts_info);
 	return 0;
 }