SPARC64: vcc: delay device removal until close()

SPARC64: vcc: delay device removal until close()

    If a vcc device file is open while it's removed (due to a
    domain being unbound), delay the removal of the associated vcc
    device structure until the final close() call is made on
    the device. This preventsthe  device file cdev minor number from
    being reused which can result in ugly filesystem warnings to
    the console.

Orabug: 24594547

Signed-off-by: Aaron Young <aaron.young@oracle.com>
Signed-off-by: Allen Pais <allen.pais@oracle.com>
Reviewed-By: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>