CONFIG_ARCH_MX1ADS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_MX1ADS.
Result is shown for kernelversion 6.5.1

MX1ADS platform

modulename: mach-mx1ads.ko

configname: CONFIG_ARCH_MX1ADS

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

source code: