CONFIG_DEBUG_HI3716_UART is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_DEBUG_HI3716_UART.
Result is shown for kernelversion 6.5.1

Hisilicon Hi3716 Debug UART

configname: CONFIG_DEBUG_HI3716_UART

Kernel low-level debugging port
└─>Hisilicon Hi3716 Debug UART
In linux kernel since version 3.12 (release Date: 2013-11-03)  
Say Y here if you want kernel low-level debugging support
on HI3716 UART.