drm/nouveau/ramht: remove dependence on namedb

drivers/gpu/drm/nouveau/include/nvkm/core/ramht.h

drivers/gpu/drm/nouveau/nvkm/core/ramht.c

drivers/gpu/drm/nouveau/nvkm/engine/disp/gf110.c

drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c

drivers/gpu/drm/nouveau/nvkm/engine/fifo/g84.c

drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.c

drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv17.c

drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c

drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv50.c

drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv04.c

drivers/gpu/drm/nouveau/nvkm/subdev/instmem/nv40.c