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

Omicron MICCPT

modulename: omixp-setup.ko

configname: CONFIG_MACH_MICCPT

Linux Kernel Configuration
└─>Intel IXP4xx Implementation Options
└─>Omicron MICCPT
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say 'Y' here if you want your kernel to support the MICCPT
board from OMICRON electronics GmbH.

source code:
arch/arm/mach-ixp4xx/omixp-setup.c