CONFIG_PPC_XICS is not available for the selected architecture x86.
Result is shown for architecture powerpc

CONFIG_PPC_XICS (not configurable)

configname: CONFIG_PPC_XICS

Linux Kernel Configuration
└─>PPC_XICS
In linux kernel since version 3 (release Date: 2011-07-21)
selects
CONFIG_PPC_SMP_MUXED_IPI
CONFIG_HARDIRQS_SW_RESEND