CONFIG_DEBUG_HI3620_UART is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Hisilicon HI3620 Debug UART

configname: CONFIG_DEBUG_HI3620_UART

Kernel low-level debugging port
└─>Hisilicon HI3620 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 HI3620 UART.