drm/gk208/gr: minor adjustment to some random initval

Change from traces of a newer binary driver version.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/graph/ctxnv108.c

@@ -1272,7 +1272,7 @@ nv108_grctx_init_tpc[] = {
 	{ 0x419e68,   1, 0x04, 0x00000002 },
 	{ 0x419e6c,  12, 0x04, 0x00000000 },
 	{ 0x419eac,   1, 0x04, 0x00001f8f },
-	{ 0x419eb0,   1, 0x04, 0x0db00da0 },
+	{ 0x419eb0,   1, 0x04, 0x0db00d2f },
 	{ 0x419eb8,   1, 0x04, 0x00000000 },
 	{ 0x419ec8,   1, 0x04, 0x0001304f },
 	{ 0x419f30,   4, 0x04, 0x00000000 },