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

XWAY

modulename: clk-xway.ko

and/or

pci-lantiq.ko

configname: CONFIG_SOC_XWAY

SoC Type
└─>XWAY
In linux kernel since version 3 (release Date: 2011-07-21)  
source code:
/arch/mips/lantiq/xway/

is selected by
CONFIG_DT_EASY50712