net: enetc: Remove setting of RX software timestamp

[ Upstream commit 3dd261ca ]

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: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20240901112803.212753-13-gal@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stable-dep-of: a562d0c4 ("net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC")
Signed-off-by: Sasha Levin <sashal@kernel.org>