drm/nouveau: make general drm modesetting init common

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

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

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

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

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

diff --cc drivers/gpu/drm/nouveau/nv04_display.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv50_crtc.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv50_cursor.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nv50_display.c
Simple merge