ARM: dts: imx: Make iomuxc node name generic

Node name should be generic, use "pinctrl" instead of "iomuxc"
for all i.MX6/7 SoCs.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6dl.dtsi

@@ -86,7 +86,7 @@ ocram: sram@900000 {
 		};
 
 		aips1: bus@2000000 {
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6dl-iomuxc";
 			};
 

arch/arm/boot/dts/imx6q.dtsi

@@ -181,7 +181,7 @@ ecspi5: spi@2018000 {
 				};
 			};
 
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6q-iomuxc";
 			};
 		};

arch/arm/boot/dts/imx6qdl.dtsi

@@ -908,7 +908,7 @@ mux: mux-controller {
 				};
 			};
 
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6dl-iomuxc", "fsl,imx6q-iomuxc";
 				reg = <0x20e0000 0x4000>;
 			};

arch/arm/boot/dts/imx6sl.dtsi

@@ -728,7 +728,7 @@ gpr: iomuxc-gpr@20e0000 {
 				reg = <0x020e0000 0x38>;
 			};
 
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6sl-iomuxc";
 				reg = <0x020e0000 0x4000>;
 			};

arch/arm/boot/dts/imx6sx.dtsi

@@ -806,7 +806,7 @@ pd_pci: power-domain@3 {
 				};
 			};
 
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6sx-iomuxc";
 				reg = <0x020e0000 0x4000>;
 			};

arch/arm/boot/dts/imx6ul.dtsi

@@ -693,7 +693,7 @@ gpc: gpc@20dc000 {
 				interrupt-parent = <&intc>;
 			};
 
-			iomuxc: iomuxc@20e0000 {
+			iomuxc: pinctrl@20e0000 {
 				compatible = "fsl,imx6ul-iomuxc";
 				reg = <0x020e0000 0x4000>;
 			};

arch/arm/boot/dts/imx7s.dtsi

@@ -490,7 +490,7 @@ kpp: keypad@30320000 {
 				status = "disabled";
 			};
 
-			iomuxc: iomuxc@30330000 {
+			iomuxc: pinctrl@30330000 {
 				compatible = "fsl,imx7d-iomuxc";
 				reg = <0x30330000 0x10000>;
 			};