net/mlx5e: Remove redundant tstamp pointer from channel structures

net/mlx5e: Remove redundant tstamp pointer from channel structures

Remove the tstamp pointer field from mlx5e_channel, mlx5e_ptp, and
mlx5e_trap structures, since it was only used to reference the tstamp
field in the priv structure. Instead, directly use the tstamp field
from priv when initializing RQ structures.

Also remove the unused hwtstamp_config field from mlx5_clock structure
as part of the cleanup.

Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/1761819910-1011051-2-git-send-email-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>