ARM: dts: aspeed: p10bmc: Enable UART2

The APSS can be accessed over the second uart on these systems.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20230126220842.885965-1-eajames@linux.ibm.com


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