dt-bindings: rng: meson: add meson-rng-s4 compatible

Add compatible for hardware number generator node for
Amlogic S4-series.
Signed-off-by: Alexey Romanov <avromanov@sberdevices.ru>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/rng/amlogic,meson-rng.yaml

@@ -14,6 +14,7 @@ properties:
   compatible:
     enum:
       - amlogic,meson-rng
+      - amlogic,meson-s4-rng
 
   reg:
     maxItems: 1