ARM: tegra: Add Tegra I2S interfaces to defconfig

This selects both the Tegra20 and Tegra30 I2S interfaces (that were
previously auto-selected by Kconfig but are not anymore) to
tegra_defconfig, as built-ins.
Signed-off-by: NPaul Kocialkowski <contact@paulk.fr>
Signed-off-by: NThierry Reding <treding@nvidia.com>

arch/arm/configs/tegra_defconfig

@@ -201,6 +201,8 @@ CONFIG_SND_HDA_CODEC_HDMI=y
 # CONFIG_SND_USB is not set
 CONFIG_SND_SOC=y
 CONFIG_SND_SOC_TEGRA=y
+CONFIG_SND_SOC_TEGRA20_I2S=y
+CONFIG_SND_SOC_TEGRA30_I2S=y
 CONFIG_SND_SOC_TEGRA_RT5640=y
 CONFIG_SND_SOC_TEGRA_WM8753=y
 CONFIG_SND_SOC_TEGRA_WM8903=y