CONFIG_MACH_NEO1973_GTA02 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

Openmoko GTA02 / Freerunner phone

modulename: mach-gta02.ko

configname: CONFIG_MACH_NEO1973_GTA02

Linux Kernel Configuration
└─>Samsung S3C24XX SoCs Support
└─>Openmoko GTA02 / Freerunner phone
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
Say Y here if you are using the Openmoko GTA02 / Freerunner GSM Phone