drm/nouveau: rework to new fence interface

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Ben Skeggs <bskeggs@redhat.com>

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

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

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

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

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

diff --cc drivers/gpu/drm/nouveau/nv04_fence.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv10_fence.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv17_fence.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv50_fence.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv84_fence.c
Simple merge