CONFIG_S3C_GPIO_PULL_UP is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S3C_GPIO_PULL_UP (not configurable)

configname: CONFIG_S3C_GPIO_PULL_UP

Linux Kernel Configuration
└─>S3C_GPIO_PULL_UP
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Internal configuration to enable the correct GPIO pull helper