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/seaboard_defconfig b/configs/seaboard_defconfig
index 5715665..62ab59d 100644
--- a/configs/seaboard_defconfig
+++ b/configs/seaboard_defconfig
@@ -22,6 +22,7 @@
 # CONFIG_SPL_EFI_PARTITION is not set
 CONFIG_DEFAULT_DEVICE_TREE="tegra20-seaboard"
 CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_I2C_TEGRA=y
 CONFIG_SPL_DM=y
 CONFIG_DM_PMIC=y
 CONFIG_DM_REGULATOR=y