x86: q35: add 'wdat' property

Used for enabling WDAT based watchdog for builtin iTCO watchdog.
Usage:
    -M q35,wdat={on|off}
By default it is disabled.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260303092532.2410177-3-imammedo@redhat.com>
2 files changed