CONFIG_SAMSUNG_GPIOLIB_4BIT is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_SAMSUNG_GPIOLIB_4BIT (not configurable)

configname: CONFIG_SAMSUNG_GPIOLIB_4BIT

Linux Kernel Configuration
└─>SAMSUNG_GPIOLIB_4BIT
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
GPIOlib file contains the 4 bit modification functions for gpio
configuration. GPIOlib shall be compiled only for S3C64XX and S5P
series of processors.