CONFIG_ARCH_MX1ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
MX1ADS platform
modulename: 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