arm64: zynqmp: Replace gpio-key,wakeup with wakeup source

The same change has been done for Zynq by commit 1241c72b6db1
("ARM: dts: zynq: replace gpio-key,wakeup with wakeup-source property")
in mainline Linux kernel.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/zynqmp-zcu208-revA.dts b/arch/arm/dts/zynqmp-zcu208-revA.dts
index 9181060..85f9e1f 100644
--- a/arch/arm/dts/zynqmp-zcu208-revA.dts
+++ b/arch/arm/dts/zynqmp-zcu208-revA.dts
@@ -50,7 +50,7 @@
 			label = "sw19";
 			gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_DOWN>;
-			gpio-key,wakeup;
+			wakeup-source;
 			autorepeat;
 		};
 	};