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

Samsung EXYNOS

modulename: exynos.ko

and/or

exynos-combiner.ko

and/or

clk-exynos-audss.ko

and/or

clk-exynos-clkout.ko

configname: CONFIG_ARCH_EXYNOS

Linux Kernel Configuration
└─>Samsung EXYNOS
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Support for SAMSUNG EXYNOS SoCs (EXYNOS4/5)

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