ramips: enable external amplifier for Xiaomi MiWiFi Mini

Attempt to boost the 2.4 GHz signal, currently very low.

Signed-off-by: D. Andrei Măceș <dmaces@nd.edu>

SVN-Revision: 46891

target/linux/ramips/dts/MIWIFI-MINI.dts

@@ -113,6 +113,11 @@
 				ralink,group = "i2c", "rgmii1";
 				ralink,function = "gpio";
 			};
+
+			pa {
+				ralink,group = "pa";
+				ralink,function = "pa";
+			};
 		};
 	};