dt-bindings: dma: rz-dmac: Document RZ/A1H SoC

Document the Renesas RZ/A1H DMAC block. This one does not have clocks,
resets and power domains. Update the bindings accordingly. Introduce a
generic name in the header to make future additions easier.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20241007110200.43166-7-wsa+renesas@sang-engineering.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/dma/renesas,rz-dmac.yaml

@@ -4,18 +4,16 @@
 $id: http://devicetree.org/schemas/dma/renesas,rz-dmac.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Renesas RZ/{G2L,G2UL,V2L} DMA Controller
+title: Renesas RZ DMA Controller
 
 maintainers:
   - Biju Das <biju.das.jz@bp.renesas.com>
 
-allOf:
-  - $ref: dma-controller.yaml#
-
 properties:
   compatible:
     items:
       - enum:
+          - renesas,r7s72100-dmac # RZ/A1H
           - renesas,r9a07g043-dmac # RZ/G2UL and RZ/Five
           - renesas,r9a07g044-dmac # RZ/G2{L,LC}
           - renesas,r9a07g054-dmac # RZ/V2L
@@ -93,13 +91,26 @@ required:
   - reg
   - interrupts
   - interrupt-names
-  - clocks
-  - clock-names
   - '#dma-cells'
   - dma-channels
-  - power-domains
-  - resets
-  - reset-names
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - renesas,r7s72100-dmac
+    then:
+      required:
+        - clocks
+        - clock-names
+        - power-domains
+        - resets
+        - reset-names
 
 additionalProperties: false