virtio-devices: vdpa: Don't restore on paused state

Since vdpa device does not support pause/resume [1], it does not make
sense to restore on paused state.

[1] https://github.com/cloud-hypervisor/cloud-hypervisor/commit/099cdd2af88ac6a8ede490e73ff0eb58a812bde2

Signed-off-by: Bo Chen <chen.bo@intel.com>

virtio-devices/src/vdpa.rs

@@ -151,7 +151,7 @@ impl Vdpa {
                     last: state.iova_range_last,
                 },
                 state.backend_features,
-                true,
+                false,
             )
         } else {
             let device_type = vhost.get_device_id().map_err(Error::GetDeviceId)?;