dt-bindings: dma: rz-dmac: Document clock-names and reset-names

Document clock-names and reset-names properties as we have multiple
clocks and resets.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230315064726.22739-1-biju.das.jz@bp.renesas.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

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

@@ -54,6 +54,11 @@ properties:
       - description: DMA main clock
       - description: DMA register access clock
 
+  clock-names:
+    items:
+      - const: main
+      - const: register
+
   '#dma-cells':
     const: 1
     description:
@@ -77,16 +82,23 @@ properties:
       - description: Reset for DMA ARESETN reset terminal
       - description: Reset for DMA RST_ASYNC reset terminal
 
+  reset-names:
+    items:
+      - const: arst
+      - const: rst_async
+
 required:
   - compatible
   - reg
   - interrupts
   - interrupt-names
   - clocks
+  - clock-names
   - '#dma-cells'
   - dma-channels
   - power-domains
   - resets
+  - reset-names
 
 additionalProperties: false
 
@@ -124,9 +136,11 @@ examples:
                           "ch12", "ch13", "ch14", "ch15";
         clocks = <&cpg CPG_MOD R9A07G044_DMAC_ACLK>,
                  <&cpg CPG_MOD R9A07G044_DMAC_PCLK>;
+        clock-names = "main", "register";
         power-domains = <&cpg>;
         resets = <&cpg R9A07G044_DMAC_ARESETN>,
                  <&cpg R9A07G044_DMAC_RST_ASYNC>;
+        reset-names = "arst", "rst_async";
         #dma-cells = <1>;
         dma-channels = <16>;
     };