CONFIG_ARCH_MPS2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARM MPS2 platform

modulename: v2m-mps2.ko

configname: CONFIG_ARCH_MPS2

Linux Kernel Configuration
└─>System Type
└─>ARM MPS2 platform
In linux kernel since version 3.10 (release Date: 2013-06-30)  
Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
with a range of available cores like Cortex-M3/M4/M7.

Please, note that depends which Application Note is used memory map
for the platform may vary, so adjustment of RAM base might be needed.

source code: