ARM: ux500: replace legacy *,wakeup property with wakeup-source

Though the keyboard and other driver will continue to support the legacy
"gpio-key,wakeup", "linux,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 futher copy-paste
duplication.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/boot/dts/ste-href-tvk1281618.dtsi

@@ -66,7 +66,7 @@ tc3589x_keypad {
 					keypad,num-columns = <8>;
 					keypad,num-rows = <8>;
 					linux,no-autorepeat;
-					linux,wakeup;
+					wakeup-source;
 					linux,keymap = <0x0301006b
 						        0x04010066
 							0x06040072

arch/arm/boot/dts/ste-nomadik-s8815.dts

@@ -163,7 +163,7 @@ user-button {
 			label = "user_button";
 			gpios = <&gpio0 3 0x1>;
 			linux,code = <1>; /* KEY_ESC */
-			gpio-key,wakeup;
+			wakeup-source;
 			pinctrl-names = "default";
 			pinctrl-0 = <&user_button_default_mode>;
 		};