CONFIG_SIBYTE_CARMEL is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_SIBYTE_CARMEL.
Result is shown for kernelversion 6.9.9

Sibyte BCM91120x-Carmel

configname: CONFIG_SIBYTE_CARMEL

System type
└─>Sibyte BCM91120x-Carmel
In linux kernel since version 2.6.12