kernel - Add KVABIO support to NVMe, disk translation layer, and swap

kernel - Add KVABIO support to NVMe, disk translation layer, and swap

* Add KVABIO support to the NVMe driver.  The driver no longer
  requires that buffers be synchronized to all cpus.

* Add KVABIO support to the disk translation layer.  The layer no
  longer requires that buffers besynchronized to all cpus (note
  however that the underlying device may still require such).

* Add KVABIO support to the swap subsystem.  Again, actual avoidance
  of buffer memory synchronization depends on the underlying devices.