CONFIG_ARCH_AT91SAM9260_SAM9XE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_AT91SAM9260_SAM9XE.
Result is shown for kernelversion 6.2.5


configname: CONFIG_ARCH_AT91SAM9260_SAM9XE

Linux Kernel Configuration
└─>Atmel AT91 System-on-Chip
In linux kernel since version 2.6.21 (release Date: 2007-04-25)  
Select this if you are using Atmel's AT91SAM9XE System-on-Chip.
They are basically AT91SAM9260s with various sizes of embedded Flash.