ARM: config: multi v7: Enable NVIDIA Tegra20 S/PDIF driver

Enable Tegra20 S/PDIF driver that is a part of HDMI audio subsystem.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/configs/multi_v7_defconfig

@@ -762,6 +762,7 @@ CONFIG_SND_SOC_STM32_DFSDM=m
 CONFIG_SND_SUN4I_CODEC=m
 CONFIG_SND_SOC_TEGRA=m
 CONFIG_SND_SOC_TEGRA20_I2S=m
+CONFIG_SND_SOC_TEGRA20_SPDIF=m
 CONFIG_SND_SOC_TEGRA30_I2S=m
 CONFIG_SND_SOC_TEGRA_RT5640=m
 CONFIG_SND_SOC_TEGRA_WM8753=m