CONFIG_S3C24XX_GPIO_EXTRA64 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S3C24XX_GPIO_EXTRA64 (not configurable)

configname: CONFIG_S3C24XX_GPIO_EXTRA64

Linux Kernel Configuration
└─>S3C24XX_GPIO_EXTRA64
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
Add an extra 64 gpio numbers to the available GPIO pool. This is
available for boards that need extra gpios for external devices.