arm64: dts: rockchip: remove identical &uart0 node from rk3368-lion-haikou

There are two identical &uart0 nodes in this dts file,
so remove one of them.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20191228074757.2075-1-jbx6244@gmail.com


Signed-off-by: Heiko Stuebner <heiko@sntech.de>