Revert "iommu/vt-d: Take CONFIG_PCI_ATS into account"

This reverts commit 8986f223.

The proper fix is queued in Will's tree now
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/iommu/intel/dmar.c

@@ -335,9 +335,7 @@ static void  dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info)
 
 static inline void vf_inherit_msi_domain(struct pci_dev *pdev)
 {
-#ifdef CONFIG_PCI_ATS
 	dev_set_msi_domain(&pdev->dev, dev_get_msi_domain(&pdev->physfn->dev));
-#endif
 }
 
 static int dmar_pci_bus_notifier(struct notifier_block *nb,