CONFIG_MACH_ACMENETUSFOXG20 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_ACMENETUSFOXG20.
Result is shown for kernelversion 6.5.1

Acme Systems srl FOX Board G20

modulename: board-foxg20.ko

configname: CONFIG_MACH_ACMENETUSFOXG20

Linux Kernel Configuration
└─>Atmel Non-DT world
└─>Acme Systems srl FOX Board G20
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
Select this if you are using Acme Systems
FOX Board G20 <http://www.acmesystems.it>

source code: