ARM: dts: imx6sll: add gpio clocks

i.MX6SLL 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/imx6sll.dtsi

@@ -375,6 +375,7 @@ gpio1: gpio@209c000 {
 				reg = <0x0209c000 0x4000>;
 				interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO1>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -387,6 +388,7 @@ gpio2: gpio@20a0000 {
 				reg = <0x020a0000 0x4000>;
 				interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO2>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -399,6 +401,7 @@ gpio3: gpio@20a4000 {
 				reg = <0x020a4000 0x4000>;
 				interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO3>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -413,6 +416,7 @@ gpio4: gpio@20a8000 {
 				reg = <0x020a8000 0x4000>;
 				interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO4>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -433,6 +437,7 @@ gpio5: gpio@20ac000 {
 				reg = <0x020ac000 0x4000>;
 				interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO5>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;
@@ -455,6 +460,7 @@ gpio6: gpio@20b0000 {
 				reg = <0x020b0000 0x4000>;
 				interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>,
 					     <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clks IMX6SLL_CLK_GPIO6>;
 				gpio-controller;
 				#gpio-cells = <2>;
 				interrupt-controller;