arm64: dts: rockchip: enable HDMI CEC on rk3328

This patch enables HDMI CEC on RK3328 devices.

(Unusual) source for the cec clock is taken from the vendor kernel.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -657,9 +657,11 @@ hdmi: hdmi@ff3c0000 {
 		interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&cru PCLK_HDMI>,
-			 <&cru SCLK_HDMI_SFC>;
+			 <&cru SCLK_HDMI_SFC>,
+			 <&cru SCLK_RTC32K>;
 		clock-names = "iahb",
-			      "isfr";
+			      "isfr",
+			      "cec";
 		phys = <&hdmiphy>;
 		phy-names = "hdmi";
 		pinctrl-names = "default";