ARM: dts: ux500: nomadik-pinctrl: Add &gpio_in_nopull

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 <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

arch/arm/boot/dts/ste-nomadik-pinctrl.dtsi

···
 		ste,output = <OUTPUT_LOW>;
 	};
 
+	gpio_in_nopull: gpio_input_nopull {
+		ste,gpio = <GPIOMODE_ENABLED>;
+		ste,input = <INPUT_NOPULL>;
+	};
+
 	gpio_in_pu: gpio_input_pull_up {
 		ste,gpio = <GPIOMODE_ENABLED>;
 		ste,input = <INPUT_PULLUP>;