ARM: dts: aspeed: greatlakes: Add Facebook greatlakes (AST2600) BMC

Add linux device tree entry related to
greatlakes specific devices connected to BMC SoC.

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@Wiwynn.com>
Link: https://lore.kernel.org/r/20221111034828.2377-3-Delphine_CC_Chiu@Wiwynn.com


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