CONFIG_M68KNOMMU is not available for thedefaultarchitecture x86.
Result is shown for architecture m68knommu
default or selected kernelversion does not have config value CONFIG_M68KNOMMU.
Result is shown for kernelversion 5.4.123

CONFIG_M68KNOMMU (not configurable)

configname: CONFIG_M68KNOMMU

uClinux/68k (w/o MMU) Kernel Configuration
└─>M68KNOMMU
In linux kernel since version 2.6.12