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

Extend with bootloader kernel arguments

configname: CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND

Kernel command line type
└─> Extend with bootloader kernel arguments

The command-line arguments provided by the boot loader will be
appended to the the device tree bootargs property.