CONFIG_SIBYTE_SB1xxx_SOC is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_SIBYTE_SB1xxx_SOC (not configurable)

configname: CONFIG_SIBYTE_SB1xxx_SOC

Linux Kernel Configuration
└─>SIBYTE_SB1xxx_SOC
In linux kernel since version 2.6.12