Also change the default value used in case of an error. The minimum
size is a bit severe, so let's just use an average RAM size.
Signed-off-by: NCédric Le Goater <clg@kaod.org>
Message-id: 1473438177-26079-13-git-send-email-clg@kaod.org
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>