x86/PCI: remove 64-bit division

The roundup() caused a build error (undefined reference to `__udivdi3').
We're aligning to power-of-two boundaries, so it's simpler to just use
ALIGN() anyway, which avoids the division.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

arch/x86/pci/acpi.c

@@ -69,17 +69,17 @@ align_resource(struct acpi_device *bridge, struct resource *res)
 	 * that claim this address space have starting alignment and length
 	 * constraints, so fix any obvious BIOS goofs.
 	 */
-	if (res->start & (align - 1)) {
+	if (!IS_ALIGNED(res->start, align)) {
 		dev_printk(KERN_DEBUG, &bridge->dev,
 			   "host bridge window %pR invalid; "
 			   "aligning start to %d-byte boundary\n", res, align);
 		res->start &= ~(align - 1);
 	}
-	if ((res->end + 1) & (align - 1)) {
+	if (!IS_ALIGNED(res->end + 1, align)) {
 		dev_printk(KERN_DEBUG, &bridge->dev,
 			   "host bridge window %pR invalid; "
 			   "aligning end to %d-byte boundary\n", res, align);
-		res->end = roundup(res->end, align) - 1;
+		res->end = ALIGN(res->end, align) - 1;
 	}
 }