dts: rp2040: Fixed DTC warning concerning the pinctrl node

The pinctrl node of the RP2040 had the same unit address as the GPIO
bank, causing a DTC warning. To fix this, the pinctrl's address was
removed, as it does not require any.

Signed-off-by: Yonatan Schachter <[email protected]>

Author: yonsch

dts/arm/rpi_pico/rp2040.dtsi

@@ -68,12 +68,6 @@
 			#reset-cells = <1>;
 		};
 
-		pinctrl: pin-controller@40014000 {
-			compatible = "raspberrypi,pico-pinctrl";
-			reg = <0x40014000 DT_SIZE_K(4)>;
-			status = "okay";
-		};
-
 		gpio0: gpio@40014000 {
 			compatible = "raspberrypi,pico-gpio";
 			reg = <0x40014000 DT_SIZE_K(4)>;
@@ -188,6 +182,10 @@
 			#pwm-cells = <3>;
 		};
 	};
+
+	pinctrl: pin-controller {
+		compatible = "raspberrypi,pico-pinctrl";
+	};
 };
 
 &nvic {