dt-bindings: arm: aspeed: add Facebook Greatlakes board

Document the new compatibles used on Facebook Greatlakes

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@Wiwynn.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221111034828.2377-2-Delphine_CC_Chiu@Wiwynn.com


Signed-off-by: Joel Stanley <joel@jms.id.au>