CONFIG_MN10300 is not available for thedefaultarchitecture x86.
Result is shown for architecture mn10300
default or selected kernelversion does not have config value CONFIG_MN10300.
Result is shown for kernelversion 6.7-rc3

CONFIG_MN10300 (not configurable)

configname: CONFIG_MN10300

Linux Kernel Configuration
└─>MN10300
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  

is selected by
CONFIG_MN10300_TTYSM