net/mlx5e: Symmetric OR-XOR RSS hash control

net/mlx5e: Symmetric OR-XOR RSS hash control

Allow control over the symmetric RSS hash, which was previously set to
enabled by default by the driver.

Symmetric OR-XOR RSS can now be queried and controlled using the
'ethtool -x/X' command.

Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Gal Pressman <gal@nvidia.com>
Link: https://patch.msgid.link/20250224174416.499070-3-gal@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>