dt-bindings: thermal: r9a09g047-tsu: Document RZ/V2H TSU

The Renesas RZ/V2H SoC includes a Thermal Sensor Unit (TSU) block designed
to measure the junction temperature. The device provides real-time
temperature measurements for thermal management, utilizing two dedicated
channels for temperature sensing.

The Renesas RZ/V2H SoC is using the same TSU IP found on the RZ/G3E SoC,
the only difference being that it has two channels instead of one.

Add new compatible string "renesas,r9a09g057-tsu" for RZ/V2H and use
"renesas,r9a09g047-tsu" as a fallback compatible to indicate hardware
compatibility with the RZ/G3E implementation.

Signed-off-by: Ovidiu Panait <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

Documentation/devicetree/bindings/thermal/renesas,r9a09g047-tsu.yaml

···
 
 properties:
   compatible:
-    const: renesas,r9a09g047-tsu
+    oneOf:
+      - const: renesas,r9a09g047-tsu # RZ/G3E
+      - items:
+          - const: renesas,r9a09g057-tsu # RZ/V2H
+          - const: renesas,r9a09g047-tsu # RZ/G3E
 
   reg:
     maxItems: 1