CONFIG_SBC8560 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc

WindRiver PowerQUICC III SBC8560

modulename: sbc85xx.ko

configname: CONFIG_SBC8560

Machine Type
└─>WindRiver PowerQUICC III SBC8560
In linux kernel since version 2.6.12  
This option enables support for the WindRiver PowerQUICC III
SBC8560 board.