iommufd/device: Only add reserved_iova in non-pasid path

iommufd/device: Only add reserved_iova in non-pasid path

As the pasid is passed through the attach/replace/detach helpers, it is
necessary to ensure only the non-pasid path adds reserved_iova.

Link: https://patch.msgid.link/r/20250321171940.7213-5-yi.l.liu@intel.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>