CONFIG_OPAL_PRD is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

OPAL PRD driver

modulename: opal-prd.ko

configname: CONFIG_OPAL_PRD

Linux Kernel Configuration
└─>OPAL PRD driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This enables the opal-prd driver, a facility to run processor
recovery diagnostics on OpenPower machines

source code:
arch/powerpc/platforms/powernv/opal-prd.c