CONFIG_SIBYTE_CFE is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
Booting from CFE
configname: CONFIG_SIBYTE_CFE
Linux Kernel Configuration
└─>Booting from CFE
In linux kernel since version 2.6.12
Make use of the CFE API for enumerating available memory,
controlling secondary CPUs, and possibly console output.
controlling secondary CPUs, and possibly console output.