arm: tegra12_defconfig: renormalize the defconfig

arm: tegra12_defconfig: renormalize the defconfig

No actual configuration changes. Config items have shifted around,
causing confusion when making actuall configuration changes.
This defconfig is generated with the following process under the
kernel directory:
make tegra12_defconfig
make oldconfig
make savedefconfig
cp defconfig arch/arm/configs/tegra12_defconfig

Change-Id: Ic0c197cf6bad4cb4ddd7742215fab8a1e8d30a50
Signed-off-by: Zheng Liu <zhliu@nvidia.com>
Reviewed-on: http://git-master/r/494897
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Allen Martin <amartin@nvidia.com>