CONFIG_ARCH_AT91SAM9260_SAM9XE is not available for the default architecture 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 5.6.17


configname: CONFIG_ARCH_AT91SAM9260_SAM9XE

Linux Kernel Configuration
└─> Atmel AT91 System-on-Chip
└─> AT91SAM9XE

Select this if you are using Atmel's AT91SAM9XE System-on-Chip.
They are basically AT91SAM9260s with various sizes of embedded Flash.