RDMA/mlx5: Fix CC counters query for MPV

In case, CC counters are querying for the second port use the correct
core device for the query instead of always using the master core device.

Fixes: aac4492 ("IB/mlx5: Update counter implementation for dual port RoCE")
Signed-off-by: Patrisious Haddad <[email protected]>
Reviewed-by: Michael Guralnik <[email protected]>
Link: https://patch.msgid.link/9cace74dcf106116118bebfa9146d40d4166c6b0.1750064969.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <[email protected]>

Author: PatrisiousHaddad

drivers/infiniband/hw/mlx5/counters.c

@@ -418,7 +418,7 @@ static int do_get_hw_stats(struct ib_device *ibdev,
 			 */
 			goto done;
 		}
-		ret = mlx5_lag_query_cong_counters(dev->mdev,
+		ret = mlx5_lag_query_cong_counters(mdev,
 						   stats->value +
 						   cnts->num_q_counters,
 						   cnts->num_cong_counters,