CONFIG_APM is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Advanced Power Management Emulation

modulename: hp6xx_apm.ko

and/or

apm.ko

configname: CONFIG_APM

Linux/SuperH Kernel Configuration
└─>Power management options (EXPERIMENTAL)
└─>Advanced Power Management Emulation
In linux kernel since version 2.6.12  
source code:
arch/sh/boards/hp6xx/hp6xx_apm.c
depends
CONFIG_EXPERIMENTAL
CONFIG_PM