SPARC64: UEK4 LDOMS DOMAIN SERVICES UPDATE 3

SPARC64: UEK4 LDOMS DOMAIN SERVICES UPDATE 3

  This update provides the following fix for LDom domain services on UEK4.

  1. Add an event to the vlds driver which is used to signal
  process(es) using libds that the vlds /dev devices have been updated.
  When it receives this event, libds will refresh/update it's internal
  list of vlds devices allowing the list to stay immediately up-to-date
  when vlds devices have changed. This event fixes some DR related libds
  problems found during regression testing due to libds internal vlds
  device list becoming stale.

  Signed-off-by: Aaron Young <aaron.young@oracle.com>
  Reviewed-by: Alexandre Chartre <Alexandre.Chartre@oracle.com>
  Orabug: 22853109

(cherry picked from commit 1722beeac0278656731b8f0da394fb2f6a0b17b3)
(cherry picked from commit 80d160e808f283c1438e8681eedfee287f53a955)
Signed-off-by: Allen Pais <allen.pais@oracle.com>