dt-bindings: tegra: Add missing HDA properties

Document the missing properties which are currently required for
Tegra186/Tegra194 DT files.

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1607006202-4078-3-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/nvidia,tegra30-hda.yaml

@@ -60,6 +60,20 @@ properties:
       - const: hda2hdmi
       - const: hda2codec_2x
 
+  power-domains:
+    maxItems: 1
+
+  interconnects:
+    maxItems: 2
+
+  interconnect-names:
+    items:
+      - const: dma-mem
+      - const: write
+
+  iommus:
+    maxItems: 1
+
   nvidia,model:
     $ref: /schemas/types.yaml#/definitions/string
     description: |