arm64: dts: rockchip: Fix power-controller node names for rk3399

Use more generic names (as recommended in the device tree specification
or the binding documentation)

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210417112952.8516-8-jbx6244@gmail.com


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