ARM i.MX dtsi: Add default bus-width property for esdhc controller

According to Documentation/devicetree/bindings/mmc/mmc.txt bus-width
is a mandatory property. While this is currently enforced nowhere, it's
a good habit to just add the property now to allow to add common helper
functionality for the mmc property parsing later.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx51.dtsi

@@ -87,6 +87,7 @@ esdhc@70008000 { /* ESDHC2 */
 					compatible = "fsl,imx51-esdhc";
 					reg = <0x70008000 0x4000>;
 					interrupts = <2>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 
@@ -119,6 +120,7 @@ esdhc@70020000 { /* ESDHC3 */
 					compatible = "fsl,imx51-esdhc";
 					reg = <0x70020000 0x4000>;
 					interrupts = <3>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 
@@ -126,6 +128,7 @@ esdhc@70024000 { /* ESDHC4 */
 					compatible = "fsl,imx51-esdhc";
 					reg = <0x70024000 0x4000>;
 					interrupts = <4>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 			};

arch/arm/boot/dts/imx53.dtsi

@@ -85,6 +85,7 @@ esdhc@50004000 { /* ESDHC1 */
 					compatible = "fsl,imx53-esdhc";
 					reg = <0x50004000 0x4000>;
 					interrupts = <1>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 
@@ -92,6 +93,7 @@ esdhc@50008000 { /* ESDHC2 */
 					compatible = "fsl,imx53-esdhc";
 					reg = <0x50008000 0x4000>;
 					interrupts = <2>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 
@@ -124,6 +126,7 @@ esdhc@50020000 { /* ESDHC3 */
 					compatible = "fsl,imx53-esdhc";
 					reg = <0x50020000 0x4000>;
 					interrupts = <3>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 
@@ -131,6 +134,7 @@ esdhc@50024000 { /* ESDHC4 */
 					compatible = "fsl,imx53-esdhc";
 					reg = <0x50024000 0x4000>;
 					interrupts = <4>;
+					bus-width = <4>;
 					status = "disabled";
 				};
 			};

arch/arm/boot/dts/imx6q.dtsi

@@ -849,6 +849,7 @@ usdhc@02190000 { /* uSDHC1 */
 				interrupts = <0 22 0x04>;
 				clocks = <&clks 163>, <&clks 163>, <&clks 163>;
 				clock-names = "ipg", "ahb", "per";
+				bus-width = <4>;
 				status = "disabled";
 			};
 
@@ -858,6 +859,7 @@ usdhc@02194000 { /* uSDHC2 */
 				interrupts = <0 23 0x04>;
 				clocks = <&clks 164>, <&clks 164>, <&clks 164>;
 				clock-names = "ipg", "ahb", "per";
+				bus-width = <4>;
 				status = "disabled";
 			};
 
@@ -867,6 +869,7 @@ usdhc@02198000 { /* uSDHC3 */
 				interrupts = <0 24 0x04>;
 				clocks = <&clks 165>, <&clks 165>, <&clks 165>;
 				clock-names = "ipg", "ahb", "per";
+				bus-width = <4>;
 				status = "disabled";
 			};
 
@@ -876,6 +879,7 @@ usdhc@0219c000 { /* uSDHC4 */
 				interrupts = <0 25 0x04>;
 				clocks = <&clks 166>, <&clks 166>, <&clks 166>;
 				clock-names = "ipg", "ahb", "per";
+				bus-width = <4>;
 				status = "disabled";
 			};