ARM: dts: imx6ul: add GPIO clocks

i.MX6UL has GPIO clock gates in CCM CCGR, add
clock property for GPIO driver to make sure all
GPIO banks work as expected.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul.dtsi

@@ -433,6 +433,7 @@ gpio1: gpio@209c000 {
 				reg = <0x0209c000 0x4000>;
 				interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6UL_CLK_GPIO1>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -446,6 +447,7 @@ gpio2: gpio@20a0000 {
 				reg = <0x020a0000 0x4000>;
 				interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6UL_CLK_GPIO2>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -458,6 +460,7 @@ gpio3: gpio@20a4000 {
 				reg = <0x020a4000 0x4000>;
 				interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6UL_CLK_GPIO3>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -470,6 +473,7 @@ gpio4: gpio@20a8000 {
 				reg = <0x020a8000 0x4000>;
 				interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6UL_CLK_GPIO4>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -482,6 +486,7 @@ gpio5: gpio@20ac000 {
 				reg = <0x020ac000 0x4000>;
 				interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6UL_CLK_GPIO5>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;