CONFIG_MACH_PCM027 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Phytec phyCORE-PXA270 CPU module (PCM-027)

modulename: pcm027.ko

configname: CONFIG_MACH_PCM027

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>Phytec phyCORE-PXA270 CPU module (PCM-027)
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
source code:
arch/arm/mach-pxa/pcm027.c

depends
CONFIG_ARCH_PXA