ata_piix: VGN-BX297XP wants the controller power up on suspend

Sony VGN-BX297XP fails suspend if the controller is powered down when
calling into ACPI suspend.  Add the machine to piix_broken_suspend
list.

This problem was reported by GNUtoo@no-log.org on bko#10293.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Reported-by:  <GNUtoo@no-log.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>