CONFIG_MACH_ZYLONITE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
PXA3xx Development Platform (aka Zylonite)
configname: CONFIG_MACH_ZYLONITE
Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>PXA3xx Development Platform (aka Zylonite)