SPARC64: UEK4 LDOMS DOMAIN SERVICES UPDATE 7

SPARC64: UEK4 LDOMS DOMAIN SERVICES UPDATE 7

This update fixes the following issues for LDom domain services on UEK4:

1. Kernel watchdog panic when unbinding guest domains. This panic was
   due to the ds driver accessing a freed data structure out of ds_remove().

2. "no service registered for UNREG_REQ handle" error messages on the console
   when ldmd is restarted.

Signed-off-by: Aaron Young <Aaron.Young@oracle.com>
Reviewed-By: Bijan Mottahedeh <Bijan.Mottahedeh@oracle.com>
Reviewed-By: Liam Merwick <Liam.Merwick@oracle.com>
Orabug: 25408406, 25366664
Signed-off-by: Allen Pais <allen.pais@oracle.com>