This commit adds support for driving virtio 1.0 PCI devices.  In
addition to various helpers, a number of vpm_ functions are introduced
to be used instead of their legacy vp_ counterparts when accessing
virtio 1.0 (aka modern) devices.

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain.  Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.

Also update README, LOG and COPYRIGHTS to remove obsolete information.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>