drm/nouveau: remove as much direct use of core headers as possible

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

diff --cc drivers/gpu/drm/nouveau/dispnv04/disp.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
Simple merge

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

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

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

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

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

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

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

diff --cc drivers/gpu/drm/nouveau/nouveau_dp.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

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

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

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

diff --cc drivers/gpu/drm/nouveau/nv04_fbcon.c
Simple merge

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

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

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

diff --cc drivers/gpu/drm/nouveau/nv50_display.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

diff --cc drivers/gpu/drm/nouveau/nvc0_fence.c
Simple merge