drm/nouveau/fifo/nv04-nv40: fix missing nvkm_kmap() calls around ramfc access

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

drivers/gpu/drm/nouveau/nvkm/engine/fifo/dmanv04.c

@@ -95,6 +95,7 @@ nv04_fifo_dma_fini(struct nvkm_fifo_chan *base)
 		nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0);
 
 		c = fifo->ramfc;
+		nvkm_kmap(fctx);
 		do {
 			u32 rm = ((1ULL << c->bits) - 1) << c->regs;
 			u32 cm = ((1ULL << c->bits) - 1) << c->ctxs;
@@ -102,6 +103,7 @@ nv04_fifo_dma_fini(struct nvkm_fifo_chan *base)
 			u32 cv = (nvkm_ro32(fctx, c->ctxp + data) & ~cm);
 			nvkm_wo32(fctx, c->ctxp + data, cv | (rv << c->ctxs));
 		} while ((++c)->bits);
+		nvkm_done(fctx);
 
 		c = fifo->ramfc;
 		do {