[PATCHES] add virtio input device

Hi,

Here comes a bunch of patches inplementing the virtio input device for
review.  One patch for the virtio specification.  One patch for the
linux kernel.  A small patch series for qemu.  Please review.

Note that the qemu patch series has dependencies on unmerged input layer
patches (waiting for the tree being opened up for 2.1), so if you wanna
play with please fetch everything here:
	http://www.kraxel.org/cgit/qemu/log/?h=rebase/input-wip

cheers,
  Gerd