net/mlx5e: Fix q counters on uplink representors

Need to allocate the q counters before init_rx which needs them
when creating the rq.

Fixes: 8520fa57

 ("net/mlx5e: Create q counters on uplink representors")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>