CONFIG_S3C2410_PM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_S3C2410_PM (not configurable)

modulename: pm-s3c2410.ko

and/or

pm.ko

configname: CONFIG_S3C2410_PM

Linux Kernel Configuration
└─>S3C2410_PM
In linux kernel since version 2.6.19 (release Date: 2006-11-29)  
Power Management code common to S3C2410 and better

source code:
/arch/arm/mach-s3c2410/
depends
 or CONFIG_ARCH_S3C24XX