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

Use the ARM v7 PMSA Compliant MPU

modulename: pmsa-v7.ko

configname: CONFIG_ARM_MPU

Linux Kernel Configuration
└─>Use the ARM v7 PMSA Compliant MPU
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Some ARM systems without an MMU have instead a Memory Protection
Unit (MPU) that defines the type and permissions for regions of

If your CPU has an MPU then you should choose 'y' here unless you
know that you do not want to use the MPU.

source code: