ARM: dts: aspeed: Add device tree for Ufispace NCPLite BMC

Add initial version of device tree for Ufispace NCPlite platform
which is equipped with AST2600-based BMC.

Signed-off-by: Jordan Chang <jordan.chang@ufispace.com>
Link: https://lore.kernel.org/r/20230119102102.73414-4-jordan.chang@ufispace.com


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