hw/i386: define _AS_LATEST() macros for machine types

hw/i386: define _AS_LATEST() macros for machine types

Follow the other architecture targets by adding extra macros for
defining a versioned machine type as the latest. This reduces the
size of the changes when introducing new machine types at the start
of each release cycle.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20240910163041.3764176-1-berrange@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Message-ID: <20241126103005.3794748-2-cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>