dtb: xgene: Add rxlos-gpios property

Added rxlos GPIO mapping by adding rxlos-gpios property.
Signed-off-by: NQuan Nguyen <qnguyen@apm.com>
Signed-off-by: NIyappan Subramanian <isubramanian@apm.com>
Tested-by: NFushen Chen <fchen@apm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/arm64/boot/dts/apm/apm-mustang.dts

@@ -74,6 +74,7 @@
 
 &xgenet {
 	status = "ok";
+	rxlos-gpios = <&sbgpio 12 1>;
 };
 
 &mmc0 {