CONFIG_ARCH_MX1ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

MX1ADS platform

modulename: mx1ads.ko

and/or

mach-mx1ads.ko

configname: CONFIG_ARCH_MX1ADS

Linux Kernel Configuration
└─>MX1ADS platform
In linux kernel since version 2.6.12  
Say Y here if you are using Motorola MX1ADS/MXLADS boards

source code:
arch/arm/mach-mx1/mx1ads.c