drm/nouveau/mmu: fix vram heap sizing

{

	struct nvkm_device *device = mmu->subdev.device;

	struct nvkm_mm *mm = &device->fb->ram->vram;

	const u32 sizeN = nvkm_mm_heap_size(mm, NVKM_RAM_MM_NORMAL);

	const u32 sizeU = nvkm_mm_heap_size(mm, NVKM_RAM_MM_NOMAP);

	const u32 sizeM = nvkm_mm_heap_size(mm, NVKM_RAM_MM_MIXED);

	const u64 sizeN = nvkm_mm_heap_size(mm, NVKM_RAM_MM_NORMAL);

	const u64 sizeU = nvkm_mm_heap_size(mm, NVKM_RAM_MM_NOMAP);

	const u64 sizeM = nvkm_mm_heap_size(mm, NVKM_RAM_MM_MIXED);

	u8 type = NVKM_MEM_KIND * !!mmu->func->kind;

	u8 heap = NVKM_MEM_VRAM;

	int heapM, heapN, heapU;