ramips: mt7621-dts: fix switch@1f warnings

Remove reg property from ports node to fix this warning:

Warning (unit_address_vs_reg): /ethernet@1e100000/mdio-bus/switch@1f/ports: node has a reg or ranges property, but no unit name

Another warning surfaces afterwards. Remove #address-cells and #size-cells
from switch@1f node to fix this warning:

Warning (avoid_unnecessary_addr_size): /ethernet@1e100000/mdio-bus/switch@1f: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>

target/linux/ramips/dts/mt7621.dtsi

@@ -481,8 +481,6 @@
 
 			switch0: switch@1f {
 				compatible = "mediatek,mt7621";
-				#address-cells = <1>;
-				#size-cells = <0>;
 				reg = <0x1f>;
 				mediatek,mcm;
 				resets = <&rstctrl 2>;
@@ -494,7 +492,6 @@
 				ports {
 					#address-cells = <1>;
 					#size-cells = <0>;
-					reg = <0>;
 
 					port@0 {
 						status = "disabled";