CONFIG_MACH_AT91RM9200EK is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Atmel AT91RM9200-EK Evaluation Kit
modulename: board-rm9200ek.ko
configname: CONFIG_MACH_AT91RM9200EK
Linux Kernel Configuration
└─>Atmel Non-DT world
└─>Atmel AT91RM9200-EK Evaluation Kit
In linux kernel since version 2.6.16 (release Date: 2006-03-19)
Select this if you are using Atmel's AT91RM9200-EK Evaluation Kit.
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3507>
<http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3507>