ARM: dts: rockchip: fix adc-keys sub node names

Fix adc-keys sub node names on Rockchip boards,
so that they match with regex: '^button-'
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/7a0013b1-3a55-a344-e9ea-eacb4b49433c@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3066a-mk808.dts

@@ -32,7 +32,7 @@ adc-keys {
 		keyup-threshold-microvolt = <2500000>;
 		poll-interval = <100>;
 
-		recovery {
+		button-recovery {
 			label = "recovery";
 			linux,code = <KEY_VENDOR>;
 			press-threshold-microvolt = <0>;

arch/arm/boot/dts/rk3288-evb.dtsi

@@ -28,19 +28,19 @@ button-down {
 			press-threshold-microvolt = <300000>;
 		};
 
-		menu {
+		button-menu {
 			label = "Menu";
 			linux,code = <KEY_MENU>;
 			press-threshold-microvolt = <640000>;
 		};
 
-		esc {
+		button-esc {
 			label = "Esc";
 			linux,code = <KEY_ESC>;
 			press-threshold-microvolt = <1000000>;
 		};
 
-		home  {
+		button-home  {
 			label = "Home";
 			linux,code = <KEY_HOME>;
 			press-threshold-microvolt = <1300000>;