CONFIG_PLAT_S3C64XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
CONFIG_PLAT_S3C64XX (not configurable)
configname: CONFIG_PLAT_S3C64XX
Linux Kernel Configuration
└─>PLAT_S3C64XX
In linux kernel since version 2.6.29 (release Date: 2009-03-23)
Base platform code for any Samsung S3C64XX device