CONFIG_MN10300_UNIT_ASB2305 is not available for thedefaultarchitecture x86.
Result is shown for architecture mn10300

ASB2305

configname: CONFIG_MN10300_UNIT_ASB2305

Unit type
└─>ASB2305
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
is selected by
CONFIG_PCI