CONFIG_MACH_MX27ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

MX27ADS platform

modulename: mach-mx27ads.ko

and/or

mx27ads.ko

configname: CONFIG_MACH_MX27ADS

Linux Kernel Configuration
└─>MX27ADS platform
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
Include support for MX27ADS platform. This includes specific
configurations for the board and its peripherals.

source code:
arch/arm/mach-mx2/mx27ads.c