ACPI sleeping whilst atomic warnings on resume.

This has been broken for months. On resume, we call acpi_pci_link_set() with interrupts off, so we get a warning when we try to do a kmalloc of non atomic memory. The actual allocation is just 2 long's (plus extra byte for some reason I can't fathom), so a simple conversion to GFP_ATOMIC is probably the safest way to fix this.

The error looks like this..

Debug: sleeping function called from invalid context at mm/slab.c:2486 in_atomic():0, irqs_disabled():1

 [<c0143f6c>] kmem_cache_alloc+0x40/0x56
 [<c0206a2e>] acpi_pci_link_set+0x3f/0x17f
 [<c0206f96>] irqrouter_resume+0x1e/0x3c
 [<c0239bca>] __sysdev_resume+0x11/0x6b
 [<c0239e88>] sysdev_resume+0x34/0x52
 [<c023de21>] device_power_up+0x5/0xa

@@ -316,7 +316,7 @@ static int acpi_pci_link_set(struct acpi
 	if (!link || !irq)
 		return_VALUE(-EINVAL);
 
-	resource = kmalloc(sizeof(*resource) + 1, GFP_KERNEL);
+	resource = kmalloc(sizeof(*resource) + 1, GFP_ATOMIC);
 	if (!resource)
 		return_VALUE(-ENOMEM);