drm/nouveau/core: move handle-based object apis to handle.c

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

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

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

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

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