CONFIG_PS3_SYS_MANAGER is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

PS3 System Manager driver

modulename: sys-manager.ko

configname: CONFIG_PS3_SYS_MANAGER

Linux Kernel Configuration
└─>PS3 Platform Options
└─>PS3 System Manager driver
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
Include support for the PS3 System Manager.

This support is required for system control. In
general, all users will say Y.

source code: