CONFIG_AT91_SAM9G45_RESET is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_AT91_SAM9G45_RESET (not configurable)

modulename: at91sam9g45_reset.ko

configname: CONFIG_AT91_SAM9G45_RESET

Linux Kernel Configuration
└─>AT91_SAM9G45_RESET
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
/arch/arm/mach-at91/