ARM: dts: shmobile/r8a7xxx: replace gpio-key, wakeup with wakeup-source property

Though the keyboard driver for GPIO buttons(gpio-keys) will continue to
check for/support the legacy "gpio-key,wakeup" boolean property to
enable gpio buttons as wakeup source, "wakeup-source" is the new
standard binding.

This patch replaces the legacy "gpio-key,wakeup" with the unified
"wakeup-source" property in order to avoid any futher copy-paste
duplication.

Signed-off-by: Sudeep Holla <[e-mail]>
Acked-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Simon Horman <[e-mail]>

arch/arm/boot/dts/r8a73a4-ape6evm.dts

···
 			gpios = <&pfc 324 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_0>;
 			label = "S16";
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		menu-key {

arch/arm/boot/dts/r8a7740-armadillo800eva.dts

···
 			gpios = <&pfc 99 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_POWER>;
 			label = "SW3";
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		back-key {

arch/arm/boot/dts/r8a7790-lager.dts

···
 		button@1 {
 			linux,code = <KEY_1>;
 			label = "SW2-1";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 			gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
 		};
 		button@2 {
 			linux,code = <KEY_2>;
 			label = "SW2-2";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 			gpios = <&gpio1 24 GPIO_ACTIVE_LOW>;
 		};
 		button@3 {
 			linux,code = <KEY_3>;
 			label = "SW2-3";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 			gpios = <&gpio1 26 GPIO_ACTIVE_LOW>;
 		};
 		button@4 {
 			linux,code = <KEY_4>;
 			label = "SW2-4";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 			gpios = <&gpio1 28 GPIO_ACTIVE_LOW>;
 		};

arch/arm/boot/dts/r8a7791-koelsch.dts

···
 			gpios = <&gpio5 0 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_1>;
 			label = "SW2-1";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-2 {
 			gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_2>;
 			label = "SW2-2";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-3 {
 			gpios = <&gpio5 2 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_3>;
 			label = "SW2-3";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-4 {
 			gpios = <&gpio5 3 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_4>;
 			label = "SW2-4";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-a {
 			gpios = <&gpio7 0 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_A>;
 			label = "SW30";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-b {
 			gpios = <&gpio7 1 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_B>;
 			label = "SW31";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-c {
 			gpios = <&gpio7 2 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_C>;
 			label = "SW32";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-d {
 			gpios = <&gpio7 3 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_D>;
 			label = "SW33";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-e {
 			gpios = <&gpio7 4 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_E>;
 			label = "SW34";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-f {
 			gpios = <&gpio7 5 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_F>;
 			label = "SW35";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 		key-g {
 			gpios = <&gpio7 6 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_G>;
 			label = "SW36";
-			gpio-key,wakeup;
+			wakeup-source;
 			debounce-interval = <20>;
 		};
 	};

arch/arm/boot/dts/sh73a0-kzm9g.dts

···
 			gpios = <&pcf8575 14 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_HOME>;
 			label = "SW1";
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 	};