x86/ioapic: Simplify ioapic_setup_resources()

	unsigned long n;

	struct resource *res;

	char *mem;

	int i, num = 0;

	int i;

	for_each_ioapic(i)

		num++;

	if (num == 0)

	if (nr_ioapics == 0)

		return NULL;

	n = IOAPIC_RESOURCE_NAME_SIZE + sizeof(struct resource);

	n *= num;

	n *= nr_ioapics;

	mem = alloc_bootmem(n);

	res = (void *)mem;

	mem += sizeof(struct resource) * num;

	mem += sizeof(struct resource) * nr_ioapics;

	num = 0;

	for_each_ioapic(i) {

		res[num].name = mem;

		res[num].flags = IORESOURCE_MEM | IORESOURCE_BUSY;

		res[i].name = mem;

		res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;

		snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i);

		mem += IOAPIC_RESOURCE_NAME_SIZE;

		ioapics[i].iomem_res = &res[num];

		num++;

		ioapics[i].iomem_res = &res[i];

	}

	ioapic_resources = res;