CONFIG_MACH_COLIBRI_PXA270_INCOME is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Income s.r.o. PXA270 SBC

modulename: colibri-pxa270-income.ko

configname: CONFIG_MACH_COLIBRI_PXA270_INCOME

Linux Kernel Configuration
└─>PXA2xx/PXA3xx-based
└─>Intel PXA2xx/PXA3xx Implementations
└─>Income s.r.o. PXA270 SBC
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
source code:
arch/arm/mach-pxa/colibri-pxa270-income.c
selects
CONFIG_PXA27x