-cpu max works with any accelerator, so we don't need
to use it only conditionally if not using KVM. Just use
it all the time.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Message-Id: <20180820155554.23476-1-peter.maydell@linaro.org>
Signed-off-by: NFam Zheng <famz@redhat.com>