CONFIG_S5PC1XX_SETUP_I2C0 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S5PC1XX_SETUP_I2C0 (not configurable)

modulename: setup-i2c0.ko

configname: CONFIG_S5PC1XX_SETUP_I2C0

Linux Kernel Configuration
└─>S5PC1XX_SETUP_I2C0
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
Common setup code for i2c bus 0.

Note, currently since i2c0 is always compiled, this setup helper
is always compiled with it.

source code:
arch/arm/plat-s5pc1xx/setup-i2c0.c