CONFIG_SOC_AT91SAM9260 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
AT91SAM9260, AT91SAM9XE or AT91SAM9G20
modulename: at91sam9260.ko
configname: CONFIG_SOC_AT91SAM9260
Linux Kernel Configuration
└─>Atmel AT91 System-on-Chip
└─>AT91SAM9260, AT91SAM9XE or AT91SAM9G20
In linux kernel since version 3.1 (release Date: 2011-10-24)
Select this if you are using one of Atmel's AT91SAM9260, AT91SAM9XE
or AT91SAM9G20 SoC.
or AT91SAM9G20 SoC.