ARM: i.MX6: Add clocks to GPT devicetree node

The i.MX6 already has a devicetree node for the GPT, but not yet
has the clocks. Add them.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl.dtsi

@@ -282,6 +282,8 @@
 				compatible = "fsl,imx6q-gpt";
 				reg = <0x02098000 0x4000>;
 				interrupts = <0 55 0x04>;
+				clocks = <&clks 119>, <&clks 120>;
+				clock-names = "ipg", "per";
 			};
 
 			gpio1: gpio@0209c000 {