CONFIG_MACH_ZYLONITE300 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

PXA3xx Development Platform (aka Zylonite) PXA300/310

modulename: zylonite.ko

configname: CONFIG_MACH_ZYLONITE300

Linux Kernel Configuration
└─>Intel PXA2xx/PXA3xx Implementations
└─>PXA3xx Development Platform (aka Zylonite) PXA300/310
In linux kernel since version 2.6.33 (release Date: 2010-02-24)  
source code:
/arch/arm/mach-pxa/

depends
CONFIG_ARCH_PXA