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

CONFIG_SYS_SUPPORTS_MIPS_CPS (not configurable)

configname: CONFIG_SYS_SUPPORTS_MIPS_CPS

Linux Kernel Configuration
└─>Kernel type
└─>SYS_SUPPORTS_MIPS_CPS
In linux kernel since version 3.15 (release Date: 2014-06-08)  
is selected by
CONFIG_MIPS_CPS_CPUIDLE