net: stmmac: 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>
Link: https://patch.msgid.link/20240906144632.404651-15-gal@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c

@@ -1200,13 +1200,13 @@ static int stmmac_get_ts_info(struct net_device *dev,
 
 		info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
 					SOF_TIMESTAMPING_TX_HARDWARE |
-					SOF_TIMESTAMPING_RX_SOFTWARE |
 					SOF_TIMESTAMPING_RX_HARDWARE |
-					SOF_TIMESTAMPING_SOFTWARE |
 					SOF_TIMESTAMPING_RAW_HARDWARE;
 
 		if (priv->ptp_clock)
 			info->phc_index = ptp_clock_index(priv->ptp_clock);
+		else
+			info->phc_index = 0;
 
 		info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);