CONFIG_STIH41X_DEBUG_ASC2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ASC2 UART

configname: CONFIG_STIH41X_DEBUG_ASC2

Low-level debug console UART
└─>ASC2 UART
In linux kernel since version 3.11 (release Date: 2013-09-02)  
Say Y here if you want kernel low-level debugging support
on STiH415/416 based platforms like b2000, which has
default UART wired up to ASC2.

If unsure, say N.


depends
 or CONFIG_ARCH_STI