dt-bindings: arm: sunxi: add Pine64 PineCube binding

Document board compatible names for Pine64 PineCube IP camera.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20200923010215.148819-1-icenowy@aosc.io
diff --git a/Documentation/devicetree/bindings/arm/sunxi.yaml b/Documentation/devicetree/bindings/arm/sunxi.yaml
index 5957a22..afa0026 100644
--- a/Documentation/devicetree/bindings/arm/sunxi.yaml
+++ b/Documentation/devicetree/bindings/arm/sunxi.yaml
@@ -631,6 +631,11 @@
           - const: pine64,pine64-plus
           - const: allwinner,sun50i-a64
 
+      - description: Pine64 PineCube
+        items:
+          - const: pine64,pinecube
+          - const: allwinner,sun8i-s3
+
       - description: Pine64 PineH64 model A
         items:
           - const: pine64,pine-h64