CONFIG_ARCH_S5PC100 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Samsung S5PC100

configname: CONFIG_ARCH_S5PC100

ARM system type
└─>Samsung S5PC100
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Samsung S5PC100 series based systems


is selected by
CONFIG_FB_S3C