cpumask: use new-style cpumask ops in mm/quicklist.

	int node = numa_node_id();

	struct zone *zones = NODE_DATA(node)->node_zones;

	int num_cpus_on_node;

	const struct cpumask *cpumask_on_node = cpumask_of_node(node);

	node_free_pages =

#ifdef CONFIG_ZONE_DMA

	max = node_free_pages / FRACTION_OF_NODE_MEM;

	num_cpus_on_node = cpus_weight_nr(*cpumask_on_node);

	num_cpus_on_node = cpumask_weight(cpumask_of_node(node));

	max /= num_cpus_on_node;

	return max(max, min_pages);