CONFIG_EXYNOS4_DEV_SYSMMU is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_EXYNOS4_DEV_SYSMMU.
Result is shown for kernelversion 6.2.5

CONFIG_EXYNOS4_DEV_SYSMMU (not configurable)

modulename: dev-sysmmu.ko

configname: CONFIG_EXYNOS4_DEV_SYSMMU

Linux Kernel Configuration
└─>EXYNOS4_DEV_SYSMMU
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Common setup code for SYSTEM MMU in EXYNOS4

source code: