kernelconfig_penguin
CONFIG_TEGRA_DEBUG_UARTB is not available for the default architecture x86.
Result is shown for architecture arm

Kernel low-level debugging messages via Tegra UART B

configname: CONFIG_TEGRA_DEBUG_UARTB

Kernel low-level debugging port
└─> Kernel low-level debugging messages via Tegra UART B

Say Y here if you want kernel low-level debugging support
on Tegra based platforms.