dt-bindings: soc: qcom: smd: restrict child name to smd-edge

Child node of SMD must be either smd-edge or rpm, so the pattern can be
narrowed.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220909125403.803158-7-krzysztof.kozlowski@linaro.org
Signed-off-by: Rob Herring <robh@kernel.org>

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

@@ -20,7 +20,7 @@ properties:
     const: qcom,smd
 
 patternProperties:
-  "^.*-edge|rpm$":
+  "^smd-edge|rpm$":
     $ref: /schemas/remoteproc/qcom,smd-edge.yaml#
     description:
       Each subnode of the SMD node represents a remote subsystem or a remote