arm64: tegra: Enable HDA on Jetson TX2

Enable the HDA controller on Jetson TX2 so that it can be used for audio
playback over HDMI.

Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts

@@ -51,6 +51,10 @@
 		vmmc-supply = <&vdd_sd>;
 	};
 
+	hda@3510000 {
+		status = "okay";
+	};
+
 	pcie@10003000 {
 		status = "okay";