drm/nouveau/fb: make external class definitions pointers

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

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv04.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv10.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv20.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv30.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv40.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nv50.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nvc0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/engine/device/nve0.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/include/subdev/fb.h
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv04.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv10.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv1a.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv20.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv25.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv30.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv35.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv36.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv40.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv41.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv44.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv46.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv47.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv49.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv4e.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nv50.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/core/subdev/fb/nvc0.c
Simple merge