ARM: dts: s5pv210: align gpio-key node names with dtschema

The node names should be generic and DT schema expects certain pattern
(e.g. with key/button/switch).
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220609114047.380793-9-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/s5pv210-fascinate4g.dts

@@ -17,20 +17,20 @@ chosen {
 	gpio-keys {
 		compatible = "gpio-keys";
 
-		power {
+		key-power {
 			label = "power";
 			gpios = <&gph2 6 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_POWER>;
 			wakeup-source;
 		};
 
-		vol-down {
+		key-vol-down {
 			label = "volume_down";
 			gpios = <&gph3 2 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEDOWN>;
 		};
 
-		vol-up {
+		key-vol-up {
 			label = "volume_up";
 			gpios = <&gph3 1 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEUP>;

arch/arm/boot/dts/s5pv210-galaxys.dts

@@ -24,26 +24,26 @@ nand_pwrseq: nand-pwrseq {
 	gpio-keys {
 		compatible = "gpio-keys";
 
-		power {
+		key-power {
 			label = "power";
 			gpios = <&gph2 6 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_POWER>;
 			wakeup-source;
 		};
 
-		vol-down {
+		key-vol-down {
 			label = "volume_down";
 			gpios = <&gph3 1 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEDOWN>;
 		};
 
-		vol-up {
+		key-vol-up {
 			label = "volume_up";
 			gpios = <&gph3 2 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_VOLUMEUP>;
 		};
 
-		home {
+		key-home {
 			label = "home";
 			gpios = <&gph3 5 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_HOME>;