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

Add initial version of device tree for Facebook Cloudripper (AST2600) BMC.

Cloudripper is Facebook's next generation switch platform with an AST2600
BMC integrated for health monitoring purpose.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210805222818.8391-5-rentao.bupt@gmail.com


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