Merge branch 'virtio_net-enable-premapped-mode-by-default'

Xuan Zhuo says:

====================
virtio_net: enable premapped mode by default

v1:
    1. fix some small problems
    2. remove commit "virtio_net: introduce vi->mode"

In the last linux version, we disabled this feature to fix the
regress[1].

The patch set is try to fix the problem and re-enable it.

More info: http://lore.kernel.org/all/20240820071913.68004-1-xuanzhuo@linux.alibaba.com

[1]: http://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@oracle.com
====================

Link: https://patch.msgid.link/20241029084615.91049-1-xuanzhuo@linux.alibaba.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>