Add the "init" anf "sleep" pinctrl as the OTP gpio state.
We need the OTP pin is gpio state before resetting the TSADC controller,
since the tshut polarity will generate a high signal.

"init" pinctrl property is defined by Doug's Patch[0].

Patch[0]:
https://patchwork.kernel.org/patch/7454311/Signed-off-by: NCaesar Wang <wxt@rock-chips.com>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>