arm64: dts: rockchip: add the tcpc for rk3399 power domain

The tcpc is the Type C Port Controller and Type C Port Delivery (tcpd)
is part of it, we haven't used them now, add it to save power consumption.

Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>