CONFIG_ARM64_LSE_ATOMICS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

CONFIG_ARM64_LSE_ATOMICS (not configurable)

configname: CONFIG_ARM64_LSE_ATOMICS

Linux Kernel Configuration
└─>Kernel Features
└─>ARMv8.1 architectural features
└─>ARM64_LSE_ATOMICS
In linux kernel since version 3.10 (release Date: 2013-06-30)