dt-bindings: mux: restrict node name suffixes

Make the pattern matching node names a bit stricter to improve DTS
consistency.  The pattern is restricted to -N suffixes to decimal
numbers.
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/20240109082511.15278-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/mux/mux-controller.yaml

@@ -74,7 +74,7 @@ select:
 
 properties:
   $nodename:
-    pattern: '^mux-controller(@.*|-[0-9a-f]+)?$'
+    pattern: '^mux-controller(@.*|-([0-9]|[1-9][0-9]+))?$'
 
   '#mux-control-cells':
     enum: [ 0, 1 ]