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

CBE thermal support

modulename: cbe_thermal.ko

configname: CONFIG_CBE_THERM

Linux Kernel Configuration
└─>Cell Broadband Engine options
└─>CBE thermal support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
source code:
arch/powerpc/platforms/cell/cbe_thermal.c