boards: nucleo_l432kc: fix GPIO definitions

The ST Nucleo L432KC board only has a reset switch and not user switch.
It has a single user LED connected to PB3, and called LD3 in the ST
documentation.

This patch fixes the corresponding device tree definition. At the same
time also it also fixes the documentation, where the name of the power
and user LEDs are swapped.

Signed-off-by: Aurelien Jarno <[email protected]>

Author: aurel32

boards/arm/nucleo_l432kc/doc/nucleol432kc.rst

@@ -18,7 +18,7 @@ some highlights of the Nucleo L432KC board:
   - USB VBUS or external source(3.3V, 5V, 7 - 12V)
   - Power management access point
 
-- Three LEDs: USB communication (LD1), user LED (LD2), power LED (LD3)
+- Three LEDs: USB communication (LD1), power LED (LD2), user LED (LD3)
 - One push-button: RESET
 
 .. image:: img/nucleo32_ulp_logo.jpg

boards/arm/nucleo_l432kc/nucleo_l432kc.dts

@@ -19,23 +19,14 @@
 
 	leds {
 		compatible = "gpio-leds";
-		green_led_2: led@0 {
-			gpios = <&gpioa 5 GPIO_INT_ACTIVE_HIGH>;
-			label = "User LD2";
-		};
-	};
-
-	gpio_keys {
-		compatible = "gpio-keys";
-		user_button: button@0 {
-			label = "User";
-			gpios = <&gpioc 13 GPIO_INT_ACTIVE_LOW>;
+		green_led: led@0 {
+			gpios = <&gpiob 3 GPIO_INT_ACTIVE_HIGH>;
+			label = "User LD3";
 		};
 	};
 
 	aliases {
-		led0 = &green_led_2;
-		sw0 = &user_button;
+		led0 = &green_led;
 	};
 };