The USB OTG U3 port may have been disabled early, add support to the
COMBPHY driver to re-enable the U3 port.
This matches changes made in the Linux commit 7bb14b61b7d0 ("phy:
rockchip: naneng-combphy: Enable U3 OTG port for RK3568").
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Acked-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>