dt-bindings: thermal: rzg2l-thermal: Document RZ/G2UL bindings

Document RZ/G2UL TSU bindings. The TSU block on RZ/G2UL is identical to one
found on RZ/G2L SoC. No driver changes are required as generic compatible
string "renesas,rzg2l-tsu" will be used as a fallback.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220501081930.23743-1-biju.das.jz@bp.renesas.comSigned-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

Documentation/devicetree/bindings/thermal/rzg2l-thermal.yaml

@@ -17,6 +17,7 @@ properties:
   compatible:
     items:
       - enum:
+          - renesas,r9a07g043-tsu # RZ/G2UL
           - renesas,r9a07g044-tsu # RZ/G2{L,LC}
           - renesas,r9a07g054-tsu # RZ/V2L
       - const: renesas,rzg2l-tsu