dt-bindings: media: csi: Add interconnects properties

The Allwinner CSI controller is sitting beside the MBUS that is represented
as an interconnect.

Make sure that the interconnect properties are valid in the binding.

Fixes: 7866d6903c ("media: dt-bindings: media: sun4i-csi: Add compatible for CSI0 on R40")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml

@@ -51,6 +51,16 @@ properties:
   resets:
     maxItems: 1
 
+  # FIXME: This should be made required eventually once every SoC will
+  # have the MBUS declared.
+  interconnects:
+    maxItems: 1
+
+  # FIXME: This should be made required eventually once every SoC will
+  # have the MBUS declared.
+  interconnect-names:
+    const: dma-mem
+
   # See ./video-interfaces.txt for details
   port:
     type: object