mediatek: fix uart node for tplink 7dr72x0

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

target/linux/mediatek/dts/mt7988d-tplink-tl-7dr-common.dtsi

@@ -19,7 +19,7 @@
 		led-running = &led_status_green;
 		led-upgrade = &led_status_green;
 		label-mac-device = &gmac0;
-		serial0 = &serial0;
+		serial0 = &uart0;
 	};
 
 	chosen {
@@ -310,10 +310,6 @@
 	};
 };
 
-&serial0 {
-	status = "okay";
-};
-
 &spi0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&spi0_flash_pins>;
@@ -393,6 +389,10 @@
 	status = "okay";
 };
 
+&uart0 {
+	status = "okay";
+};
+
 &watchdog {
 	status = "okay";
 };