ath79: drop pointless usb trigger-source override in longdata aps256

The &usb override re-declares hub_port/@address-cells/#size-cells with
values identical to the ones inherited from ar934x.dtsi, so it has no
effect. Drop it and leave only the status change.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/25340
Signed-off-by: Robert Marko <robimarko@gmail.com>

target/linux/ath79/dts/ar9344_longdata_aps256.dts

@@ -147,14 +147,7 @@
 };
 
 &usb {
-	#address-cells = <1>;
-	#size-cells = <0>;
 	status = "okay";
-
-	hub_port: port@1 {
-		reg = <1>;
-		#trigger-source-cells = <0>;
-	};
 };
 
 &eth1 {