dt-bindings: soc: qcom: smd: reference SMD edge schema

The child node of smd is an SMD edge representing remote subsystem.
Bring back missing reference from previously sent patch (disappeared
when applying).

Link: https://lore.kernel.org/r/[email protected]
Fixes: 385fad1 ("dt-bindings: remoteproc: qcom,smd-edge: define re-usable schema for smd-edge")
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Acked-by: Rob Herring <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: krzk

Documentation/devicetree/bindings/soc/qcom/qcom,smd.yaml

@@ -21,7 +21,7 @@ properties:
 
 patternProperties:
   "^.*-edge|rpm$":
-    type: object
+    $ref: /schemas/remoteproc/qcom,smd-edge.yaml#
     description:
       Each subnode of the SMD node represents a remote subsystem or a remote
       processor of some sort - or in SMD language an "edge". The name of the