ARM: dts: ux500: Fix up DSI controller nodes

These nodes should be named dsi-controller@* so fix it up.

Cc: Stephan Gerhold <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

arch/arm/boot/dts/ste-dbx5x0.dtsi

···
 			ranges;
 			status = "disabled";
 
-			dsi0: dsi@a0351000 {
+			dsi0: dsi-controller@a0351000 {
 				compatible = "ste,mcde-dsi";
 				reg = <0xa0351000 0x1000>;
 				clocks = <&prcmu_clk PRCMU_DSI0CLK>, <&prcmu_clk PRCMU_DSI0ESCCLK>;
···
 				#address-cells = <1>;
 				#size-cells = <0>;
 			};
-			dsi1: dsi@a0352000 {
+			dsi1: dsi-controller@a0352000 {
 				compatible = "ste,mcde-dsi";
 				reg = <0xa0352000 0x1000>;
 				clocks = <&prcmu_clk PRCMU_DSI1CLK>, <&prcmu_clk PRCMU_DSI1ESCCLK>;
···
 				#address-cells = <1>;
 				#size-cells = <0>;
 			};
-			dsi2: dsi@a0353000 {
+			dsi2: dsi-controller@a0353000 {
 				compatible = "ste,mcde-dsi";
 				reg = <0xa0353000 0x1000>;
 				/* This DSI port only has the Low Power / Energy Save clock */

arch/arm/boot/dts/ste-href-tvk1281618-r2.dtsi

···
 		mcde@a0350000 {
 			status = "okay";
 
-			dsi@a0351000 {
+			dsi-controller@a0351000 {
 				panel {
 					compatible = "samsung,s6d16d0";
 					reg = <0>;

arch/arm/boot/dts/ste-href-tvk1281618-r3.dtsi

···
 		mcde@a0350000 {
 			status = "okay";
 
-			dsi@a0351000 {
+			dsi-controller@a0351000 {
 				panel {
 					compatible = "sony,acx424akp";
 					reg = <0>;