CONFIG_MACH_NXDB500 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Enable Hilscher nxdb500 Eval Board support
modulename: nxdb500.ko
configname: CONFIG_MACH_NXDB500
Linux Kernel Configuration
└─>NetX Implementations
└─>Enable Hilscher nxdb500 Eval Board support
In linux kernel since version 2.6.18 (release Date: 2006-09-19)
Board support for the Hilscher nxdb500 Eval Board