kernelconfig_penguin
CONFIG_SYS_SUPPORTS_ZBOOT_UART16550 is not available for the default architecture x86.
Result is shown for architecture mips

CONFIG_SYS_SUPPORTS_ZBOOT_UART16550 (not configurable)

configname: CONFIG_SYS_SUPPORTS_ZBOOT_UART16550

Linux Kernel Configuration
└─> CPU selection
└─> SYS_SUPPORTS_ZBOOT_UART16550