ARM: dts: imx6qdl-sabresd: Add CEC support

HDMI_TX_CEC_LINE pin is used for CEC, so pass it in the device tree.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -213,6 +213,8 @@ &fec {
 };
 
 &hdmi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hdmi_cec>;
 	ddc-i2c-bus = <&i2c2>;
 	status = "okay";
 };
@@ -485,6 +487,12 @@ MX6QDL_PAD_GPIO_5__GPIO1_IO05  0x1b0b0
 			>;
 		};
 
+		pinctrl_hdmi_cec: hdmicecgrp {
+			fsl,pins = <
+				MX6QDL_PAD_KEY_ROW2__HDMI_TX_CEC_LINE	0x1f8b0
+			>;
+		};
+
 		pinctrl_i2c1: i2c1grp {
 			fsl,pins = <
 				MX6QDL_PAD_CSI0_DAT8__I2C1_SDA		0x4001b8b1