drm/nvc0: fix typo in PRAMIN flush

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

drivers/gpu/drm/nouveau/nvc0_instmem.c

@@ -134,7 +134,7 @@ void
 nvc0_instmem_flush(struct drm_device *dev)
 {
 	nv_wr32(dev, 0x070000, 1);
-	if (!nv_wait(0x070000, 0x00000001, 0x00000000))
+	if (!nv_wait(0x070000, 0x00000002, 0x00000000))
 		NV_ERROR(dev, "PRAMIN flush timeout\n");
 }