ARM: dts: aspeed: Add uart routing to device tree

Add LPC uart routing to the device tree for Aspeed SoCs.

Signed-off-by: Oskar Senft <osk@google.com>
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Tested-by: Lei YU <yulei.sh@bytedance.com>
Link: https://lore.kernel.org/r/20210927023053.6728-6-chiawei_wang@aspeedtech.com


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