CONFIG_SOC_EXYNOS3250 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SAMSUNG EXYNOS3250

modulename: clk-exynos3250.ko

configname: CONFIG_SOC_EXYNOS3250

Linux Kernel Configuration
└─>Samsung EXYNOS
└─>SAMSUNG EXYNOS3250
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
drivers/clk/samsung/clk-exynos3250.c