arm64: dts: rockchip: Enable USB3 for rk3328 Rock Pi E

Enable USB3 nodes for the Rock Pi E board.

The VBUS regulator device node was added when the board was first
introduced.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20210504083616.9654-4-wens@kernel.org


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