ath79: qca955x: remove double declaration

No need to mention the same value twice

Signed-off-by: Koen Vandeputte <[email protected]>

target/linux/ath79/dts/qca955x.dtsi

@@ -112,8 +112,7 @@
 			};
 
 			pll: pll-controller@18050000 {
-				compatible = "qca,qca9550-pll",
-						"qca,qca9550-pll", "syscon";
+				compatible = "qca,qca9550-pll", "syscon";
 				reg = <0x18050000 0x50>;
 
 				#clock-cells = <1>;