MLK-25678 arm64: dts: imx8ulp-evk: change ONOFF key to gpio key

Since ONOFF key release status can't be detect on i.mx8ulp which means
long press can't be detect in Android, use another gpio key PTF31(SW4)
to sense ONOFF key. Besides, Vol+/- keys change to rpmsg key SW7/SW8 to
meet the requirement of Android changing volume during low power audio
playback while kernel maybe in suspend, and only PTF7(SW2) in APD side
could wake up from DSM. So move Vol+/- to RTD domain.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Jacky Bai <ping.bai@nxp.com>

arch/arm64/boot/dts/freescale/imx8ulp-evk.dts

@@ -22,31 +22,25 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_keys>;
 
-		volume-up {
-			label = "Volume Up";
-			gpios = <&gpiof 7 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_VOLUMEUP>;
-		};
-
-		volume-down {
-			label = "Volume Down";
-			gpios = <&gpiof 30 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_VOLUMEDOWN>;
-		};
-
-		volume-home {
-			label = "Volume Home";
+		power-on {
+			label = "PowerOn";
 			gpios = <&gpiof 31 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_VOLUMEDOWN>;
+			linux,code = <KEY_POWER>;
 		};
 	};
 
 	rpmsg_keys: rpmsg-keys {
 		compatible = "fsl,rpmsg-keys";
 
-		power-on {
-			label = "PowerOn";
-			linux,code = <KEY_POWER>;
+		volume-up {
+			label = "VolumeUp";
+			linux,code = <KEY_VOLUMEUP>;
+			rpmsg-key,wakeup;
+		};
+
+		volume-down {
+			label = "VolumeDown";
+			linux,code = <KEY_VOLUMEDOWN>;
 			rpmsg-key,wakeup;
 		};
 	};
@@ -509,8 +503,6 @@
 
 	pinctrl_gpio_keys: gpiokeys {
 		fsl,pins = <
-			MX8ULP_PAD_PTF7__PTF7		0x3
-			MX8ULP_PAD_PTF30__PTF30		0x3
 			MX8ULP_PAD_PTF31__PTF31		0x3
 		>;
 	};