ARM: dts: Replace legacy *,wakeup property with wakeup-source for exynos boards

Though the keyboard and other driver will continue to support the legacy
"gpio-key,wakeup", "linux-keypad,wakeup" boolean property to enable the
wakeup source, "wakeup-source" is the new standard binding.

This patch replaces all the legacy wakeup properties with the unified
"wakeup-source" property in order to avoid any further copy-paste
duplication.

Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
index c000532..8b2acc7 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -34,42 +34,42 @@
 			label = "SW-TACT2";
 			gpios = <&gpx1 4 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_MENU>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		home {
 			label = "SW-TACT3";
 			gpios = <&gpx1 5 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_HOME>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		up {
 			label = "SW-TACT4";
 			gpios = <&gpx1 6 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_UP>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		down {
 			label = "SW-TACT5";
 			gpios = <&gpx1 7 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_DOWN>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		back {
 			label = "SW-TACT6";
 			gpios = <&gpx2 0 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_BACK>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 
 		wakeup {
 			label = "SW-TACT7";
 			gpios = <&gpx2 1 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_WAKEUP>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 	};