ramips: drop redundant status for gpio/gpio0

The first gpio controller (gpio or gpio0) is always enabled by
default in the SoC DTSI files. No need to set status=okay in the
device DTS files a second time.

Remove the redundant statements.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ramips/dts/mt7620a_dovado_tiny-ac.dts

@@ -45,10 +45,6 @@
 	};
 };
 
-&gpio0 {
-	status = "okay";
-};
-
 &gpio2 {
 	status = "okay";
 };