CONFIG_ARCH_INTEGRATOR is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

ARM Ltd. Integrator family

modulename: integrator.ko

configname: CONFIG_ARCH_INTEGRATOR

Linux Kernel Configuration
└─>ARM Ltd. Integrator family
In linux kernel since version 2.6.12  
Support for ARM's Integrator platform.

source code:
arch/arm/mach-versatile/integrator.c