Input: matrix_keypad - change name of wakeup property to "wakeup-source"

Wakeup property of device is not Linux-specific, it describes intended
system behavior regardless of the OS being used. Therefore let's drop
"linux," prefix, and, while at it, use the same name as I2C bus does:
"wakeup-source".

We keep parsing old name to keep compatibility with old DTSes.

Cc: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt

@@ -19,7 +19,7 @@ Required Properties:
 
 Optional Properties:
 - linux,no-autorepeat:	do no enable autorepeat feature.
-- linux,wakeup:		use any event on keypad as wakeup event.
+- wakeup-source:	use any event on keypad as wakeup event.
 - debounce-delay-ms:	debounce interval in milliseconds
 - col-scan-delay-us:	delay, measured in microseconds, that is needed
 			before we can scan keypad after activating column gpio

drivers/input/keyboard/matrix_keypad.c

@@ -425,8 +425,10 @@ matrix_keypad_parse_dt(struct device *dev)
 
 	if (of_get_property(np, "linux,no-autorepeat", NULL))
 		pdata->no_autorepeat = true;
-	if (of_get_property(np, "linux,wakeup", NULL))
+
-		pdata->wakeup = true;
+	pdata->wakeup = of_property_read_bool(np, "wakeup-source") ||
+			of_property_read_bool(np, "linux,wakeup"); /* legacy */
+
 	if (of_get_property(np, "gpio-activelow", NULL))
 		pdata->active_low = true;