ARM: dts: imx6ul: specify proper clocks for the PWM nodes

i.MX6UL PWMs require real clocks. Define the appropriate clocks for
the PWM units.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul.dtsi

@@ -508,8 +508,8 @@ pwm5: pwm@020f0000 {
 				compatible = "fsl,imx6ul-pwm", "fsl,imx27-pwm";
 				reg = <0x020f0000 0x4000>;
 				interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>;
-				clocks = <&clks IMX6UL_CLK_DUMMY>,
-					 <&clks IMX6UL_CLK_DUMMY>;
+				clocks = <&clks IMX6UL_CLK_PWM5>,
+					 <&clks IMX6UL_CLK_PWM5>;
 				clock-names = "ipg", "per";
 				#pwm-cells = <2>;
 			};
@@ -518,8 +518,8 @@ pwm6: pwm@020f4000 {
 				compatible = "fsl,imx6ul-pwm", "fsl,imx27-pwm";
 				reg = <0x020f4000 0x4000>;
 				interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
-				clocks = <&clks IMX6UL_CLK_DUMMY>,
-					 <&clks IMX6UL_CLK_DUMMY>;
+				clocks = <&clks IMX6UL_CLK_PWM6>,
+					 <&clks IMX6UL_CLK_PWM6>;
 				clock-names = "ipg", "per";
 				#pwm-cells = <2>;
 			};
@@ -528,8 +528,8 @@ pwm7: pwm@020f8000 {
 				compatible = "fsl,imx6ul-pwm", "fsl,imx27-pwm";
 				reg = <0x020f8000 0x4000>;
 				interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
-				clocks = <&clks IMX6UL_CLK_DUMMY>,
-					 <&clks IMX6UL_CLK_DUMMY>;
+				clocks = <&clks IMX6UL_CLK_PWM7>,
+					 <&clks IMX6UL_CLK_PWM7>;
 				clock-names = "ipg", "per";
 				#pwm-cells = <2>;
 			};
@@ -538,8 +538,8 @@ pwm8: pwm@020fc000 {
 				compatible = "fsl,imx6ul-pwm", "fsl,imx27-pwm";
 				reg = <0x020fc000 0x4000>;
 				interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
-				clocks = <&clks IMX6UL_CLK_DUMMY>,
-					 <&clks IMX6UL_CLK_DUMMY>;
+				clocks = <&clks IMX6UL_CLK_PWM8>,
+					 <&clks IMX6UL_CLK_PWM8>;
 				clock-names = "ipg", "per";
 				#pwm-cells = <2>;
 			};