ARM: dts: apalis/colibri-imx6/6ull/7: proper gpio-key node names

The node names should be generic and DT schema expects certain pattern
(e.g. starting with key/button/switch).
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-apalis.dtsi

@@ -41,7 +41,7 @@ gpio-keys {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_keys>;
 
-		wakeup {
+		key-wakeup {
 			debounce-interval = <10>;
 			gpios = <&gpio1 4 GPIO_ACTIVE_LOW>;
 			label = "Wake-Up";

arch/arm/boot/dts/imx6qdl-colibri.dtsi

@@ -36,7 +36,7 @@ gpio-keys {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpio_keys>;
 
-		wakeup {
+		key-wakeup {
 			debounce-interval = <10>;
 			gpios = <&gpio2 22 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* SODIMM 45 */
 			label = "Wake-Up";

arch/arm/boot/dts/imx6ull-colibri.dtsi

@@ -51,7 +51,7 @@ gpio-keys {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_snvs_gpiokeys>;
 
-		wakeup {
+		key-wakeup {
 			debounce-interval = <10>;
 			gpios = <&gpio5 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* SODIMM 45 */
 			label = "Wake-Up";

arch/arm/boot/dts/imx7-colibri.dtsi

@@ -39,7 +39,7 @@ gpio-keys {
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_gpiokeys>;
 
-		wakeup {
+		key-wakeup {
 			debounce-interval = <10>;
 			gpios = <&gpio1 1 (GPIO_ACTIVE_HIGH | GPIO_PULL_DOWN)>; /* SODIMM 45 */
 			label = "Wake-Up";