arm64: dts: zynqmp: replace gpio-key,wakeup with wakeup-source property

Most of the legacy "gpio-key,wakeup" boolean property is already
replaced with "wakeup-source". However few occurrences of old property
has popped up again, probably from the remnants in downstream trees.

This patch replaces the legacy properties with the unified
"wakeup-source" property introduced by:
"Input: gpio_keys - switch to using generic device properties"
(sha1: 700a38b2)

Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts

@@ -49,7 +49,7 @@ sw4 {
 			label = "sw4";
 			gpios = <&gpio 23 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_POWER>;
-			gpio-key,wakeup;
+			wakeup-source;
 			autorepeat;
 		};
 	};

arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts

@@ -46,7 +46,7 @@ sw19 {
 			label = "sw19";
 			gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_DOWN>;
-			gpio-key,wakeup;
+			wakeup-source;
 			autorepeat;
 		};
 	};

arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts

@@ -46,7 +46,7 @@ sw19 {
 			label = "sw19";
 			gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_DOWN>;
-			gpio-key,wakeup;
+			wakeup-source;
 			autorepeat;
 		};
 	};

arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts

@@ -46,7 +46,7 @@ sw19 {
 			label = "sw19";
 			gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_DOWN>;
-			gpio-key,wakeup;
+			wakeup-source;
 			autorepeat;
 		};
 	};