CONFIG_CPU_S5PV310 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_CPU_S5PV310 (not configurable)

modulename: cpu.ko

and/or

setup-i2c0.ko

configname: CONFIG_CPU_S5PV310

Linux Kernel Configuration
└─>CPU_S5PV310
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Enable S5PV310 CPU support

source code:
/arch/arm/mach-s5pv310/

is selected by
CONFIG_SERIAL_S5PV210