ARM: dts: imx5: make src node name generic

Node name should be generic, use "reset-controller" instead of "src" for
i.MX5 SoCs src nodes.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx50.dtsi

@@ -328,7 +328,7 @@ uart2: serial@53fc0000 {
 				status = "disabled";
 			};
 
-			src: src@53fd0000 {
+			src: reset-controller@53fd0000 {
 				compatible = "fsl,imx50-src", "fsl,imx51-src";
 				reg = <0x53fd0000 0x4000>;
 				interrupts = <75>;

arch/arm/boot/dts/imx51.dtsi

@@ -439,7 +439,7 @@ uart2: serial@73fc0000 {
 				status = "disabled";
 			};
 
-			src: src@73fd0000 {
+			src: reset-controller@73fd0000 {
 				compatible = "fsl,imx51-src";
 				reg = <0x73fd0000 0x4000>;
 				interrupts = <75>;

arch/arm/boot/dts/imx53.dtsi

@@ -588,7 +588,7 @@ can2: can@53fcc000 {
 				status = "disabled";
 			};
 
-			src: src@53fd0000 {
+			src: reset-controller@53fd0000 {
 				compatible = "fsl,imx53-src", "fsl,imx51-src";
 				reg = <0x53fd0000 0x4000>;
 				interrupts = <75>;