drm/nouveau/fifo: Hook up pause and resume for NV50 and NV84+

Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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

diff --cc drivers/gpu/drm/nouveau/core/engine/fifo/nv84.c
Simple merge