dt-bindings: dmaengine: Introduce RZN1 DMA compatible

Just like for the NAND controller that is also on this SoC, let's
provide a SoC generic and a more specific couple of compatibles for the
DMA controller.

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

Author: miquelraynal

Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml

@@ -15,7 +15,13 @@ allOf:
 
 properties:
   compatible:
-    const: snps,dma-spear1340
+    oneOf:
+      - const: snps,dma-spear1340
+      - items:
+          - enum:
+              - renesas,r9a06g032-dma
+          - const: renesas,rzn1-dma
+
 
   "#dma-cells":
     minimum: 3