ARM: dts: aspeed: mtmitchell: Add MCTP

Enable MCTP driver on I2C3 bus for MCTP transaction

Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230620092537.20007-4-chanh@os.amperecomputing.com


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