default or selected kernelversion does not have config value CONFIG_MTD_PMC_MSP_EVM.
Result is shown for kernelversion 6.9.5

CFI Flash device mapped on PMC-Sierra MSP

modulename: pmcmsp-flash.ko

configname: CONFIG_MTD_PMC_MSP_EVM

Linux Kernel Configuration
└─>Device Drivers
└─>Memory Technology Device (MTD) support
└─>Mapping drivers for chip access
└─>CFI Flash device mapped on PMC-Sierra MSP
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
This provides a 'mapping' driver which supports the way
in which user-programmable flash chips are connected on the
PMC-Sierra MSP eval/demo boards.

source code: