ACPI: IORT: Handle device properties with software node API

The older device property API is going to be removed.
Replacing the device_add_properties() call with software
node API equivalent device_create_managed_software_node().

Fixes: 434b73e6 ("iommu/arm-smmu-v3: Use device properties for pasid-num-bits")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>