Kconfig: tegra: Migrate SYS_I2C_TEGRA

Migrate SYS_I2C_TEGRA from headers to Kconfig

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Cc: Peter.Chubb@data61.csiro.au
Cc: Lucas Stach <dev@lynxeye.de>
Cc: Stefan Agner <stefan.agner@toradex.com>
Cc: Alban Bedel <alban.bedel@avionic-design.de>
Cc: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/configs/tec-ng_defconfig b/configs/tec-ng_defconfig
index 250d7f0..1fd54ee 100644
--- a/configs/tec-ng_defconfig
+++ b/configs/tec-ng_defconfig
@@ -23,6 +23,7 @@
 # CONFIG_SPL_DOS_PARTITION is not set
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_DEFAULT_DEVICE_TREE="tegra30-tec-ng"
+CONFIG_SYS_I2C_TEGRA=y
 CONFIG_SPL_DM=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_WINBOND=y