iommu: Remove is_pci_dev() fall-back from iommu_group_get_for_dev

All callers of iommu_group_get_for_dev() provide a
device_group call-back now, so this fall-back is no longer
needed.
Signed-off-by: NJoerg Roedel <jroedel@suse.de>

drivers/iommu/iommu.c

@@ -845,8 +845,6 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
 
 	if (ops && ops->device_group)
 		group = ops->device_group(dev);
-	else if (dev_is_pci(dev))
-		group = pci_device_group(dev);
 
 	if (IS_ERR(group))
 		return group;