ARM: tegra: defconfig updates

Enable:
* SND_SOC_TEGRA_WM8753 (new feature)
* TPS65910 (Cardhu regulator)
* CONFIG_I2C_MUX (dependency of:)
* CONFIG_I2C_MUX_PINCTRL (for Seaboard)

Remove some deleted options:
* MACH_KAEN
* MACH_VENTANA
* MACH_WARIO

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>