CONFIG_MIPS_CPS_PM is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_MIPS_CPS_PM (not configurable)

modulename: pm-cps.ko

configname: CONFIG_MIPS_CPS_PM

Linux Kernel Configuration
└─>Kernel type
└─>MIPS_CPS_PM
In linux kernel since version 3.16 (release Date: 2014-08-03)  
source code:
arch/mips/kernel/pm-cps.c
selects
CONFIG_MIPS_CPC

is depended by
CONFIG_MIPS_CPS_CPUIDLE