drm/nouveau/gk20a: stop setting DMA_ATTR_NON_CONSISTENT

DMA_ATTR_NON_CONSISTENT is a no-op except on PA-RISC and a few MIPS
configs, so don't set it in this ARM specific driver part.
Signed-off-by: NChristoph Hellwig <hch@lst.de>

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

@@ -594,8 +594,7 @@ gk20a_instmem_new(struct nvkm_device *device, int index,
 
 		nvkm_info(&imem->base.subdev, "using IOMMU\n");
 	} else {
-		imem->attrs = DMA_ATTR_NON_CONSISTENT |
-			      DMA_ATTR_WEAK_ORDERING |
+		imem->attrs = DMA_ATTR_WEAK_ORDERING |
 			      DMA_ATTR_WRITE_COMBINE;
 
 		nvkm_info(&imem->base.subdev, "using DMA API\n");