iommu/fsl: Always allocate a group for non-pci devices

fsl_pamu_device_group() is only called if dev->iommu_group is NULL, so
iommu_group_get() always returns NULL. Remove this test and just allocate
a group. Call generic_device_group() for this like the other drivers.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1-v2-ce71068deeec+4cf6-fsl_rm_groups_jgg@nvidia.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/fsl_pamu_domain.c

@@ -437,7 +437,7 @@ static struct iommu_group *fsl_pamu_device_group(struct device *dev)
 	if (dev_is_pci(dev))
 		group = get_pci_device_group(to_pci_dev(dev));
 	else if (of_get_property(dev->of_node, "fsl,liodn", &len))
-		group = get_device_iommu_group(dev);
+		return generic_device_group(dev);
 
 	return group;
 }