CONFIG_H8300H_GENERIC is not available for thedefaultarchitecture x86.
Result is shown for architecture h8300
default or selected kernelversion does not have config value CONFIG_H8300H_GENERIC.
Result is shown for kernelversion 6.2.5

H8/300H Generic

configname: CONFIG_H8300H_GENERIC

H8/300 platform
└─>H8/300H Generic
In linux kernel since version 2.6.12  
H8/300H CPU Generic Hardware Support