net/mlx5e: Remove unneeded semicolon

Fixes coccicheck warning:

drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c:690:2-3: Unneeded semicolon
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c

@@ -687,7 +687,7 @@ mlx5_tc_ct_block_flow_offload(enum tc_setup_type type, void *type_data,
 		return mlx5_tc_ct_block_flow_offload_stats(ft, f);
 	default:
 		break;
-	};
+	}
 
 	return -EOPNOTSUPP;
 }