ramips: add support for Digineo AC1200 Pro

This is basically a ZBT-WG3526 (mt7621 SoC), but with 32M flash.

Signed-off-by: Dominik Menke <dom@digineo.de>

target/linux/ramips/dts/AC1200pro.dts

@@ -0,0 +1,15 @@
+/dts-v1/;
+
+#include "ZBT-WG3526.dtsi"
+
+/ {
+	model = "Digineo AC1200 Pro";
+};
+
+&firmware {
+	reg = <0x50000 0x1fb0000>;
+};
+
+&status_led {
+	label = "ac1200pro:green:status";
+};