DVS2 of pmic is connected to GND, no pinctrl for it.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>

Link: https://lore.kernel.org/r/20200305113912.32226-2-andy.yan@rock-chips.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>