CONFIG_UHI_BOOT is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_UHI_BOOT (not configurable)

configname: CONFIG_UHI_BOOT

Linux Kernel Configuration
└─>Kernel type
└─>UHI_BOOT
In linux kernel since version 4.2 (release Date: 2015-08-30)