qemu qxl kms driver

Hi,

This is a KMS driver for the QXL virtual hw device shipped in qemu.

The first patch just adds some ttm symbol exports, the second contains the driver.

Its also in my git repo here http://cgit.freedesktop.org/~airlied/linux/log/?h=qxl-upstream

The userspace driver is here http://cgit.freedesktop.org/~airlied/xf86-video-qxl/log/?h=qxl-kms

There is also a header file addition to libdrm: http://cgit.freedesktop.org/~airlied/drm/log/?h=qxl-kms though I could probably drop it into the ddx at this point, since there isn't really any DRI usefulness on this hw yet. Though maybe we can save a copy or two in some fast paths.

Dave.