net/mlx5: Bridge, match FDB entry vlan tag

Add support for FDB vlan-tagged entries. Extend ingress and egress flow
tables with flow groups to match packet vlan tag. Modify the flow creation
code to include vlan tag, if vlan is configured on port and vlan
configuration is supported for offload.

Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Jianbo Liu <jianbol@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>