CONFIG_S3C64XX_SETUP_SDHCI is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S3C64XX_SETUP_SDHCI (not configurable)

modulename: setup-sdhci.ko

configname: CONFIG_S3C64XX_SETUP_SDHCI

Linux Kernel Configuration
└─>S3C64XX_SETUP_SDHCI
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Internal configuration for default SDHCI setup for S3C6400 and
S3C6410 SoCs.

source code: