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
└─>S3C2442 Machines
└─>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

source code:
arch/arm/mach-s3c2442/mach-gta02.c