CONFIG_MACH_N30 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Acer N30

modulename: mach-n30.ko

configname: CONFIG_MACH_N30

Linux Kernel Configuration
└─>S3C2410 Machines
└─>Acer N30
In linux kernel since version 2.6.12  
Say Y here if you are using the Acer N30

source code: