ramips: fix logic level for DIR-645 buttons

The D-Link DIR-645 currently uses an incorrect logic level for its
buttons.

Correct them in order to prevent unintentional activation of failsafe
mode.

Reported-by: Perry Melange <isprotejesvalkata@gmail.com>
Signed-off-by: David Bauer <mail@david-bauer.net>
(cherry picked from commit 929e8f0f553637076f2612fb1c2225c5cee1f7ab)

target/linux/ramips/dts/DIR-645.dts

@@ -29,13 +29,13 @@
 
 		reset {
 			label = "reset";
-			gpios = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio0 9 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_RESTART>;
 		};
 
 		wps {
 			label = "wps";
-			gpios = <&gpio0 14 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
 			linux,code = <KEY_WPS_BUTTON>;
 		};
 	};