PCI: Pass type, width, and prefetchability for window alignment

When calculating window_alignment(), type information like IORESOURCE_MEM
and IORESOURCE_PREFETCH may not be enough.  For example, on powernv, we
need to know whether the window is 64-bit or not.

This patch passes the full resource type (res->flags) for window alignment.

[bhelgaas: changelog]
Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>

drivers/pci/setup-bus.c

@@ -982,7 +982,7 @@ static int pbus_size_mem(struct pci_bus *bus, unsigned long mask,
 	}
 
 	min_align = calculate_mem_align(aligns, max_order);
-	min_align = max(min_align, window_alignment(bus, b_res->flags & mask));
+	min_align = max(min_align, window_alignment(bus, b_res->flags));
 	size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align);
 	if (children_add_size > add_size)
 		add_size = children_add_size;