net/mlx5: Lag, Update multiport eswitch check to log an error

Update the function to log an error to the user if failing to offload
the rule and while there add correct prefix for the function name.

Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>