ARM: dts: imx6qdl-tx6: Drop some duplicated properties

clocks and clock-names are already present in imx6qdl.dtsi since commit
f3e7dae3 ("ARM: dts: imx6qdl: add enet_out clk support"). The change
to imx6qdl.dtsi was explicitly done to avoid this construct in this
file, so benefit from the change and drop these properties.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-tx6.dtsi

@@ -264,11 +264,6 @@ &gpio3 19 GPIO_ACTIVE_HIGH
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet &pinctrl_enet_mdio &pinctrl_etnphy_rst>;
-	clocks = <&clks IMX6QDL_CLK_ENET>,
-		 <&clks IMX6QDL_CLK_ENET>,
-		 <&clks IMX6QDL_CLK_ENET_REF>,
-		 <&clks IMX6QDL_CLK_ENET_REF>;
-	clock-names = "ipg", "ahb", "ptp", "enet_out";
 	phy-mode = "rmii";
 	phy-reset-gpios = <&gpio7 6 GPIO_ACTIVE_LOW>;
 	phy-reset-post-delay = <10>;