drm/nouveau/mmu/gf100-: type-based vram allocation and bar mapping

drivers/gpu/drm/nouveau/include/nvif/class.h

drivers/gpu/drm/nouveau/include/nvif/if900b.h

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/Kbuild

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gf100.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gk104.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gk20a.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gm200.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gm20b.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gp100.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/gp10b.c

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/mem.h

drivers/gpu/drm/nouveau/nvkm/subdev/mmu/memgf100.c