drm/nvc0/pm: more complete parsing of clock domains

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

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

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

diff --cc drivers/gpu/drm/nouveau/nva3_pm.c
Simple merge

diff --cc drivers/gpu/drm/nouveau/nvc0_pm.c
Simple merge