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

CompuLab eXeda platform

configname: CONFIG_MACH_EXEDA

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>CompuLab eXeda platform
In linux kernel since version 2.6.30 (release Date: 2009-06-09)