CONFIG_ARCH_EXYNOS4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

SAMSUNG EXYNOS4

modulename: clk-exynos4.ko

configname: CONFIG_ARCH_EXYNOS4

Linux Kernel Configuration
└─>Samsung EXYNOS
└─>SAMSUNG EXYNOS4
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Samsung EXYNOS4 (Cortex-A9) SoC based systems

source code:
drivers/clk/samsung/clk-exynos4.c