VFIO fix for v4.16-rc7

- Revert masking INTx where it cannot be enabled, plays poorly with
    SR-IOV VFs and presumes DisINTx support.
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Merge tag 'vfio-v4.16-rc7' of git://github.com/awilliam/linux-vfio

Pull VFIO fix from Alex Williamson:
 "Revert masking INTx where it cannot be enabled - it plays poorly with
  SR-IOV VFs and presumes DisINTx support"

* tag 'vfio-v4.16-rc7' of git://github.com/awilliam/linux-vfio:
  Revert: "vfio-pci: Mask INTx if a device is not capabable of enabling it"

drivers/vfio/pci/vfio_pci.c

@@ -207,9 +207,6 @@ static bool vfio_pci_nointx(struct pci_dev *pdev)
 		}
 	}
 
-	if (!pdev->irq)
-		return true;
-
 	return false;
 }