ste-nomadik-pinctrl.dtsi already defines in_nopull and gpio_in_pu/pd,
but there is no node to configure a pin as GPIO without pull up/down.
Add a new &gpio_in_nopull node for this.
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20191125122256.53482-5-stephan@gerhold.netSigned-off-by: Linus Walleij <linus.walleij@linaro.org>