net/mlx5e: SHAMPO, Use net_prefetch API

Let the SHAMPO functions use the net-specific prefetch API,
similar to all other usages.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240603212219.1037656-2-tariqt@nvidia.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>