arm: dts: rockchip: Add HDMI out for RockPI N8/N10

This patch adds support to enable HDMI out for
N10 and N8 combinations SBCs.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/rk3399pro-vmarc-som.dtsi b/arch/arm/dts/rk3399pro-vmarc-som.dtsi
index 111d6cf..ebccc4a 100644
--- a/arch/arm/dts/rk3399pro-vmarc-som.dtsi
+++ b/arch/arm/dts/rk3399pro-vmarc-som.dtsi
@@ -39,6 +39,12 @@
 	snps,reset-gpio = <&gpio3 RK_PB7 GPIO_ACTIVE_LOW>;
 };
 
+&hdmi {
+	ddc-i2c-bus = <&i2c3>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&hdmi_cec>;
+};
+
 &i2c0 {
 	clock-frequency = <400000>;
 	i2c-scl-falling-time-ns = <30>;
@@ -285,6 +291,12 @@
 	};
 };
 
+&i2c3 {
+	i2c-scl-rising-time-ns = <450>;
+	i2c-scl-falling-time-ns = <15>;
+	status = "okay";
+};
+
 &io_domains {
 	status = "okay";
 	bt656-supply = <&vcca_1v8>;