net/mlx5e: Add listener to DMAC filter trap event

Add support for trapping packets which didn't match any DMAC in the MAC
table. Add a listener which adds/removes MAC trap rule in the flow
steering according to the trap's action trap/drop.

Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>