Get sysfs properties sucessfully.

Modify data structure virtkfd_sysfs_info.

Add function virtio_kfd_set_sysfs_system_properties, virtio_kfd_set_membank_properties,
virtio_kfd_set_cache_properties, virtio_kfd_set_iolink_properties, kfd_create_topology_device
to consturct virt-sysfs interface. Also a little modification to node_show.