ARM: dts: am335x/am57xx: replace gpio-key,wakeup with wakeup-source property

Commit 3efda001 ("ARM: dts: am335x: replace gpio-key,wakeup with
wakeup-source property") replaces all the legacy "gpio-key,wakeup" with
the unified  "wakeup-source" property to prevent any further copy-paste
duplication.

However couple of use of these legacy property sneaked in during the
merge window. This patch replaces them too.

Cc: "Benoît Cousson" <bcousson@baylibre.com>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-shc.dts

@@ -46,7 +46,7 @@ back_button {
 			gpios = <&gpio1 29 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_BACK>;
 			debounce-interval = <1000>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		front_button {
@@ -54,7 +54,7 @@ front_button {
 			gpios = <&gpio1 25 GPIO_ACTIVE_HIGH>;
 			linux,code = <KEY_FRONT>;
 			debounce-interval = <1000>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 	};
 

arch/arm/boot/dts/am57xx-cl-som-am57x.dts

@@ -545,7 +545,7 @@ ads7846@0 {
 		ti,debounce-tol = /bits/ 16 <10>;
 		ti,debounce-rep = /bits/ 16 <1>;
 
-		linux,wakeup;
+		wakeup-source;
 	};
 };