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

CONFIG_MACH_MXLADS (not configurable)

configname: CONFIG_MACH_MXLADS

Linux Kernel Configuration
└─>MACH_MXLADS
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
depends
CONFIG_ARCH_MX1

is depended by
CONFIG_ARCH_MX1ADS