ar71xx/ath79: ew-dorin, fix the trigger level for WPS button

Because the WPS button had the wrong trigger level,
the failsafe mode was triggered quite often,
after this commit:
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=27f3f493de

Signed-off-by: Catrinel Catrinescu <cc@80211.de>
(cherry picked from commit 3e03b7ac4ada4966d058871d0a1f67f1f0f408d4)

target/linux/ar71xx/files/arch/mips/ath79/mach-ew-dorin.c

@@ -47,7 +47,7 @@ static struct gpio_keys_button dorin_gpio_keys[] __initdata = {
 		.code		= KEY_WPS_BUTTON,
 		.debounce_interval = DORIN_KEYS_DEBOUNCE_INTERVAL,
 		.gpio		= DORIN_GPIO_BTN_JUMPSTART,
-		.active_low	= 1,
+		.active_low	= 0,
 	},
 	{
 		.desc		= "reset button",

target/linux/ath79/dts/ar9331_embeddedwireless_dorin.dts

@@ -34,7 +34,7 @@
 		wps {
 			label = "wps";
 			linux,code = <KEY_WPS_BUTTON>;
-			gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
 		};
 
 		reset {