spi: mt65xx: add MT8365 SoC bindings

Add binding documentation for the MT8365 SoC.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220531135026.238475-10-fparent@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/spi/mediatek,spi-mt65xx.yaml

@@ -18,6 +18,7 @@ properties:
       - items:
           - enum:
               - mediatek,mt7629-spi
+              - mediatek,mt8365-spi
           - const: mediatek,mt7622-spi
       - items:
           - enum: