dt-bindings: thermal: mediatek: Add mt7988 lvts compatible

Add compatible string for mt7988 lvts application processor.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230922055020.6436-2-linux@fw-web.de

Author: frank-w

Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml

@@ -18,6 +18,7 @@ description: |
 properties:
   compatible:
     enum:
+      - mediatek,mt7988-lvts-ap
       - mediatek,mt8192-lvts-ap
       - mediatek,mt8192-lvts-mcu
       - mediatek,mt8195-lvts-ap