ARM i.MX5: Add system reset controller (SRC) to i.MX51 and i.MX53 device tree

Also, link SRC to IPU via phandle.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx51.dtsi

@@ -70,6 +70,7 @@ ipu: ipu@40000000 {
 			interrupts = <11 10>;
 			clocks = <&clks 59>, <&clks 110>, <&clks 61>;
 			clock-names = "bus", "di0", "di1";
+			resets = <&src 2>;
 		};
 
 		aips@70000000 { /* AIPS1 */
@@ -529,6 +530,12 @@ uart2: serial@73fc0000 {
 				status = "disabled";
 			};
 
+			src: src@73fd0000 {
+				compatible = "fsl,imx51-src";
+				reg = <0x73fd0000 0x4000>;
+				#reset-cells = <1>;
+			};
+
 			clks: ccm@73fd4000{
 				compatible = "fsl,imx51-ccm";
 				reg = <0x73fd4000 0x4000>;

arch/arm/boot/dts/imx53.dtsi

@@ -75,6 +75,7 @@ ipu: ipu@18000000 {
 			interrupts = <11 10>;
 			clocks = <&clks 59>, <&clks 110>, <&clks 61>;
 			clock-names = "bus", "di0", "di1";
+			resets = <&src 2>;
 		};
 
 		aips@50000000 { /* AIPS1 */
@@ -601,6 +602,12 @@ can2: can@53fcc000 {
 				status = "disabled";
 			};
 
+			src: src@53fd0000 {
+				compatible = "fsl,imx53-src", "fsl,imx51-src";
+				reg = <0x53fd0000 0x4000>;
+				#reset-cells = <1>;
+			};
+
 			clks: ccm@53fd4000{
 				compatible = "fsl,imx53-ccm";
 				reg = <0x53fd4000 0x4000>;