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

Amstrad E3 (Delta)

modulename: board-ams-delta.ko

configname: CONFIG_MACH_AMS_DELTA

Linux Kernel Configuration
└─>Amstrad E3 (Delta)
In linux kernel since version 2.6.17 (release Date: 2006-06-17)  
Support for the Amstrad E3 (codename Delta) videophone. Say Y here
if you have such a device.

source code:
arch/arm/mach-omap1/board-ams-delta.c