iommu/fsl: Move ENODEV to fsl_pamu_probe_device()

The expectation is for the probe op to return ENODEV if the iommu is not
able to support the device. Move the check for fsl,liodn to
fsl_pamu_probe_device() simplify fsl_pamu_device_group()

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/2-v2-ce71068deeec+4cf6-fsl_rm_groups_jgg@nvidia.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>