ramips: Archer C50v1: fix LEDs active levels

All LEDs GPIOs are active low on this device.

WAN and POWER states were inverted. Add default state for power.

Tested on Archer C50v1.

Signed-off-by: Thibaut VARENE <hacks@slashdirt.org>

target/linux/ramips/dts/ArcherC50.dts

@@ -22,7 +22,7 @@
 
 		power {
 			label = "c50:green:power";
-			gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
 		};
 
 		usb {
@@ -32,7 +32,7 @@
 
 		wan {
 			label = "c50:green:wan";
-			gpios = <&gpio0 17 GPIO_ACTIVE_HIGH>;
+			gpios = <&gpio0 17 GPIO_ACTIVE_LOW>;
 		};
 
 		wan_orange {