CONFIG_ARCH_LH7A400 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_LH7A400.
Result is shown for kernelversion 5.4.69

CONFIG_ARCH_LH7A400 (not configurable)

configname: CONFIG_ARCH_LH7A400

Linux Kernel Configuration
└─>LH7A40X Implementations
└─>ARCH_LH7A400
In linux kernel since version 2.6.12