CONFIG_MACH_ZIPIT2 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Zipit Z2 Handheld

modulename: z2.ko

configname: CONFIG_MACH_ZIPIT2

Linux Kernel Configuration
└─>PXA2xx/PXA3xx-based
└─>Intel PXA2xx/PXA3xx Implementations
└─>Zipit Z2 Handheld
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
source code: