dt-bindings: firmware: arm,scmi: Allow multiple instances

Enable multiple SCMI instances by appending an instance-number suffix
to the 'scmi' node name. The SCMI spec assumes a single SCMI platform,
but in practice its responsibilities may be split across several SCMI
platform/server instances. However, only one instance can serve as the
system-wide (true) SCMI platform.

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Cristian Marussi <[e-mail]>
Signed-off-by: Nikunj Kela <[e-mail]>
Signed-off-by: Deepti Jaggi <[e-mail]>
Message-Id: <[e-mail]>
Signed-off-by: Sudeep Holla <[e-mail]>

Documentation/devicetree/bindings/firmware/arm,scmi.yaml

···
 
 properties:
   $nodename:
-    const: scmi
+    pattern: '^scmi(-[0-9]+)?$'
 
   compatible:
     oneOf: