dt-bindings: clock: r9a06g032-sysctrl: Reference the DMAMUX subnode

This system controller contains several registers that have nothing to
do with the clock handling, like the DMA mux register. Describe this
part of the system controller as a subnode.

Signed-off-by: Miquel Raynal <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Acked-by: Stephen Boyd <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: miquelraynal

Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.yaml

@@ -39,6 +39,17 @@ properties:
   '#power-domain-cells':
     const: 0
 
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+patternProperties:
+  "^dma-router@[a-f0-9]+$":
+    type: object
+    $ref: "../dma/renesas,rzn1-dmamux.yaml#"
+
 required:
   - compatible
   - reg