CONFIG_HARDWARE_PM is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_HARDWARE_PM.
Result is shown for kernelversion 5.3.7

CONFIG_HARDWARE_PM (not configurable)

configname: CONFIG_HARDWARE_PM

Blackfin Kernel Configuration
└─>HARDWARE_PM
In linux kernel since version 2.6.22 (release Date: 2007-07-08)  
depends
CONFIG_OPROFILE