CONFIG_H8300 is not available for thedefaultarchitecture x86.
Result is shown for architecture h8300

CONFIG_H8300 (not configurable)

configname: CONFIG_H8300

Linux Kernel Configuration
└─>H8300
In linux kernel since version 2.6.12  
selects
CONFIG_HAVE_IDE
CONFIG_HAVE_GENERIC_HARDIRQS
CONFIG_GENERIC_IRQ_SHOW

is selected by
CONFIG_SMC91X