ASoC: dt-bindings: realtek,rt5645: Fix CPVDD voltage comment

Both the ALC5645 and ALC5650 datasheets specify a recommended voltage of
1.8V for CPVDD, not 3.5V.

Fix the comment.

Cc: Matthias Brugger <matthias.bgg@gmail.com>
Fixes: 26aa1917 ("ASoC: dt-bindings: rt5645: add suppliers")
Fixes: 83d43ab0 ("ASoC: dt-bindings: realtek,rt5645: Convert to dtschema")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20241211035403.4157760-1-wenst@chromium.org


Signed-off-by: Mark Brown <broonie@kernel.org>