CONFIG_MACH_CM_A510 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CompuLab CM-A510 Board

modulename: cm-a510.ko

configname: CONFIG_MACH_CM_A510

Linux Kernel Configuration
└─>Marvell Dove Implementations
└─>CompuLab CM-A510 Board
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
Say 'Y' here if you want your kernel to support the
CompuLab CM-A510 Board.

source code:
arch/arm/mach-dove/cm-a510.c