mips: dts: ralink: rt3050: update system controller node and its consumers

Current RT3050 device tree file system controller node is wrong since it is
not matching bindings. Hence, update it to match current bindings updating
it also to use new introduced clock constants.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: paraka

arch/mips/boot/dts/ralink/rt3050.dtsi

@@ -1,4 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <dt-bindings/clock/mediatek,mtmips-sysc.h>
+
 / {
 	#address-cells = <1>;
 	#size-cells = <1>;
@@ -25,9 +27,11 @@
 		#address-cells = <1>;
 		#size-cells = <1>;
 
-		sysc@0 {
-			compatible = "ralink,rt3052-sysc", "ralink,rt3050-sysc";
+		sysc: syscon@0 {
+			compatible = "ralink,rt3052-sysc", "ralink,rt3050-sysc", "syscon";
 			reg = <0x0 0x100>;
+			#clock-cells = <1>;
+			#reset-cells = <1>;
 		};
 
 		intc: intc@200 {
@@ -50,6 +54,8 @@
 			compatible = "ralink,rt3052-uart", "ralink,rt2880-uart", "ns16550a";
 			reg = <0xc00 0x100>;
 
+			clocks = <&sysc RT305X_CLK_UARTLITE>;
+
 			interrupt-parent = <&intc>;
 			interrupts = <12>;