arm64: dts: apq8016-sbc: Correct WLAN LED default-trigger

The TX status trigger of the wlan interface is named phy0tx, so this
updates the default-trigger for the WLAN LED to use that instead.
Signed-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/apq8016-sbc.dtsi

@@ -178,7 +178,7 @@
 			led@5 {
 				label = "apq8016-sbc:yellow:wlan";
 				gpios = <&pm8916_mpps 2 GPIO_ACTIVE_HIGH>;
-				linux,default-trigger = "wlan";
+				linux,default-trigger = "phy0tx";
 				default-state = "off";
 			};