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/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 3e64d5d..1f102f3 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -43,7 +43,7 @@
 			linux,code = <KEY_POWER>;
 			label = "power key";
 			debounce-interval = <10>;
-			gpio-key,wakeup;
+			wakeup-source;
 		};
 	};
 
@@ -58,7 +58,7 @@
 			interrupt-parent = <&gpx1>;
 			interrupts = <5 0>;
 			reg = <0x25>;
-			wakeup;
+			wakeup-source;
 
 			muic: max77836-muic {
 				compatible = "maxim,max77836-muic";
@@ -246,7 +246,7 @@
 		interrupt-parent = <&gpx0>;
 		interrupts = <7 0>;
 		reg = <0x66>;
-		wakeup;
+		wakeup-source;
 
 		s2mps14_osc: clocks {
 			compatible = "samsung,s2mps14-clk";