CONFIG_ARCH_TEGRA is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

NVIDIA Tegra SoC Family

modulename: irq-tegra.ko

configname: CONFIG_ARCH_TEGRA

Linux Kernel Configuration
└─>Platform selection
└─>NVIDIA Tegra SoC Family
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
This enables support for the NVIDIA Tegra SoC family.