ARM: dts: rockchip: remove identical #include from rk3288.dtsi

There are 2 identical '#include' for 'rk3288-power.h',
so remove one of them.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200403180159.13387-1-jbx6244@gmail.com


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