net/mlx5e: en_tc, re-factor query route port

query for peer esw outside of if scope.
This is preparation for query route port over multiple peers.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>