IB/mlx5: Fix some spelling mistakes

Fix spelling mistakes in remarks
    "retrun"->"return"
    "Decalring"->"Declaring"

Signed-off-by: Talat Batheesh <talatb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/cq.c

@@ -499,7 +499,7 @@ static void mlx5_ib_poll_sw_comp(struct mlx5_ib_cq *cq, int num_entries,
 	struct mlx5_ib_qp *qp;
 
 	*npolled = 0;
-	/* Find uncompleted WQEs belonging to that cq and retrun mmics ones */
+	/* Find uncompleted WQEs belonging to that cq and return mmics ones */
 	list_for_each_entry(qp, &cq->list_send_qp, cq_send_list) {
 		sw_send_comp(qp, num_entries, wc + *npolled, npolled);
 		if (*npolled >= num_entries)