PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use

We should prefer `struct pci_device_id` over `DEFINE_PCI_DEVICE_TABLE` to
meet kernel coding style guidelines.  This issue was reported by checkpatch.

A simplified version of the semantic patch that makes this change is as
follows (http://coccinelle.lip6.fr/):

// <smpl>

@@
identifier i;
declarer name DEFINE_PCI_DEVICE_TABLE;
initializer z;
@@

- DEFINE_PCI_DEVICE_TABLE(i)
+ const struct pci_device_id i[]
= z;

// </smpl>

[bhelgaas: add semantic patch]
Signed-off-by: Benoit Taine <benoit.taine@lip6.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/xen/xen-pciback/pci_stub.c

@@ -579,7 +579,7 @@ static void pcistub_remove(struct pci_dev *dev)
 	}
 }
 
-static DEFINE_PCI_DEVICE_TABLE(pcistub_ids) = {
+static const struct pci_device_id pcistub_ids[] = {
 	{
 	 .vendor = PCI_ANY_ID,
 	 .device = PCI_ANY_ID,