dt-bindings: arm: sunxi: document RerVision A33-Vstar board

RerVision A33-Vstar is an evaluation board of their A33-Core1 SoM.

Add its compatible (with the SoM compatible) to the sunxi board DT
binding file.

Signed-off-by: Icenowy Zheng <uwu@icenowy.me>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20240913104845.4112986-1-uwu@icenowy.me
Signed-off-by: Chen-Yu Tsai <wens@csie.org>

Documentation/devicetree/bindings/arm/sunxi.yaml

@@ -846,6 +846,12 @@ properties:
           - const: allwinner,sun50i-h64
           - const: allwinner,sun50i-a64
 
+      - description: RerVision A33-Vstar (with A33-Core1 SoM)
+        items:
+          - const: rervision,a33-vstar
+          - const: rervision,a33-core1
+          - const: allwinner,sun8i-a33
+
       - description: RerVision H3-DVK
         items:
           - const: rervision,h3-dvk