at91bootstrap: add support for SAM9X60's configs
at91bootstrap: add support for SAM9X60's configs

Add SAM9X60 configs.

Signed-off-by: Claudiu Beznea <92a9d436f3b0502e1aa784f095132853060e6ace@microchip.com>
[f4ee3fcb6e54dcf71fbaefdd500eea5cee1f4f99@microchip.com Fixed merge conflicts]
Signed-off-by: Razvan Stefanescu <f4ee3fcb6e54dcf71fbaefdd500eea5cee1f4f99@microchip.com>

linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel,linux4sam/meta-atmel