CONFIG_PM is not available for the selected architecture x86.
Result is shown for architecture parisc

CONFIG_PM (not configurable)

modulename: pm.ko

and/or

kirkwood-pm.ko

and/or

mpc52xx_sleep.ko

and/or

lite5200_sleep.ko

and/or

sysfs.ko

and/or

main.ko

and/or

intel_epb.ko

configname: CONFIG_PM

Linux Kernel Configuration
└─>PM
In linux kernel since version 2.6.12 )