libdrm: Add GEM as Alloc/Free ioctls

Add drm_nouveau_as_alloc and drm_nouveau_as_free ioctl structs and their
corresponding ioctl opcodes.  These are pulled from the kernel include
files.

Change-Id: I54c7f91ed29f0c42c4245807cf80f34b196f86ec
Signed-off-by: Andrew Chew <achew@nvidia.com>
1 file changed