dt-bindings: reset: document deprecated HiSilicon property

Documenting deprecated property prevents dt-schema validation errors.
Signed-off-by: David Heidelberg <david@ixit.cz>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211208184149.99537-1-david@ixit.czSigned-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Documentation/devicetree/bindings/reset/hisilicon,hi3660-reset.yaml

@@ -24,6 +24,11 @@ properties:
           - const: hisilicon,hi3670-reset
           - const: hisilicon,hi3660-reset
 
+  hisi,rst-syscon:
+    deprecated: true
+    description: phandle of the reset's syscon, use hisilicon,rst-syscon instead
+    $ref: /schemas/types.yaml#/definitions/phandle
+
   hisilicon,rst-syscon:
     description: phandle of the reset's syscon.
     $ref: /schemas/types.yaml#/definitions/phandle