rockchip: dts: rk3399: control vbus of typec by fixed regulator

Add fixed regulator for the port of typec0 and typec1 to control vbus
instead of gpio.

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>