dt-bindings: phy: mediatek,tphy: add support for mt7986

Add compatible string for mt7986.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20230106152845.88717-2-linux@fw-web.de
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/phy/mediatek,tphy.yaml

@@ -79,6 +79,7 @@ properties:
           - enum:
               - mediatek,mt2712-tphy
               - mediatek,mt7629-tphy
+              - mediatek,mt7986-tphy
               - mediatek,mt8183-tphy
               - mediatek,mt8186-tphy
               - mediatek,mt8192-tphy