arm64: dts: mediatek: pumpkin: Remove input-name property

This property doesn't seem to exist in the documentation nor
in source code, but for some reason it is defined in a bunch
of device trees.

Signed-off-by: Dang Huynh <[email protected]>
Reviewed-by: Mattijs Korpershoek <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Matthias Brugger <[email protected]>

Author: Danct12

arch/arm64/boot/dts/mediatek/pumpkin-common.dtsi

@@ -25,7 +25,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		input-name = "gpio-keys";
 		pinctrl-names = "default";
 		pinctrl-0 = <&gpio_keys_default>;