ARM: dts: imx: change iim node name on i.MX SoCs

Change IIM node name from iim to efuse to be compliant
with yaml schema, it requires the nodename to be one of
"eeprom|efuse|nvram".

Signed-off-by: Anson Huang <[e-mail]>
Reviewed-by: Fugang Duan <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx25.dtsi

···
 				interrupts = <26>;
 			};
 
-			iim: iim@53ff0000 {
+			iim: efuse@53ff0000 {
 				compatible = "fsl,imx25-iim", "fsl,imx27-iim";
 				reg = <0x53ff0000 0x4000>;
 				interrupts = <19>;

arch/arm/boot/dts/imx27.dtsi

···
 				#clock-cells = <1>;
 			};
 
-			iim: iim@10028000 {
+			iim: efuse@10028000 {
 				compatible = "fsl,imx27-iim";
 				reg = <0x10028000 0x1000>;
 				interrupts = <62>;

arch/arm/boot/dts/imx31.dtsi

···
 				status = "disabled";
 			};
 
-			iim: iim@5001c000 {
+			iim: efuse@5001c000 {
 				compatible = "fsl,imx31-iim", "fsl,imx27-iim";
 				reg = <0x5001c000 0x1000>;
 				interrupts = <19>;

arch/arm/boot/dts/imx35.dtsi

···
 				status = "disabled";
 			};
 
-			iim@53ff0000 {
+			efuse@53ff0000 {
 				compatible = "fsl,imx35-iim";
 				reg = <0x53ff0000 0x4000>;
 				interrupts = <19>;

arch/arm/boot/dts/imx51.dtsi

···
 				reg = <0x83f00000 0x60>;
 			};
 
-			iim: iim@83f98000 {
+			iim: efuse@83f98000 {
 				compatible = "fsl,imx51-iim", "fsl,imx27-iim";
 				reg = <0x83f98000 0x4000>;
 				interrupts = <69>;

arch/arm/boot/dts/imx53.dtsi

···
 				reg = <0x63f00000 0x60>;
 			};
 
-			iim: iim@63f98000 {
+			iim: efuse@63f98000 {
 				compatible = "fsl,imx53-iim", "fsl,imx27-iim";
 				reg = <0x63f98000 0x4000>;
 				interrupts = <69>;