docs/specs/acpu_cpu_hotplug: Convert to rST

Do a basic conversion of the acpi_cpu_hotplug spec document to rST.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20210727170414.3368-2-peter.maydell@linaro.org
3 files changed