drm/nv10-: we no longer need to create nvsw object on user channels

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --cc drivers/gpu/drm/nouveau/nouveau_abi16.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nouveau_chan.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nouveau_drm.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nouveau_drm.h
Simple merge