media: staging: tegra-vde: Properly mark invalid entries

Entries in the reference picture list are marked as invalid by setting
the frame ID to 0x3f.
Signed-off-by: NThierry Reding <treding@nvidia.com>
Signed-off-by: NDmitry Osipenko <digetx@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/tegra-vde/vde.c

@@ -339,7 +339,7 @@ static void tegra_vde_setup_iram_tables(struct tegra_vde *vde,
 			value |= frame->frame_num;
 		} else {
 			aux_addr = 0x6ADEAD00;
-			value = 0;
+			value = 0x3f;
 		}
 
 		tegra_vde_setup_iram_entry(vde, 0, i, value, aux_addr);