hw/i386: Deprecate the machine types pc-0.10 and pc-0.11

hw/i386: Deprecate the machine types pc-0.10 and pc-0.11

The oldest machine type which is still used in a still maintained distro
is a pc-0.12 based machine type in RHEL6, so everything that is older
than pc-0.12 should not be used anymore. Thus let's deprecate pc-0.10
and pc-0.11 so that we can finally remove them in a future release.

Reviewed-by: Eduardo Habkost <[email protected]>
Signed-off-by: Thomas Huth <[email protected]>
Message-Id: <1529917512[email protected]>
Reviewed-by: Markus Armbruster <[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>