CONFIG_MIPS_CPS_NS16550_BOOL is not available for the selected architecture x86.
Result is shown for architecture mips
CPS SMP NS16550 UART output
configname: CONFIG_MIPS_CPS_NS16550_BOOL
Linux Kernel Configuration
└─>CPS SMP NS16550 UART output
In linux kernel since version 4.2 (release Date: 2015-08-30)
Output debug information via an ns16550 compatible UART if exceptions
occur early in the boot process of a secondary core.
occur early in the boot process of a secondary core.