ASoC: dt-bindings: google,sc7180-trogdor: allow up to four codec DAIs

SC7180 Trogdor sound cards come with multiple audio amplifiers, so allow
up to four of them to fix dtbs_check warnings like:

  sc7180-trogdor-homestar-r3.dtb: sound: dai-link@1:codec:sound-dai: [[275], [276], [277], [278]] is too long

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230507174543.264987-1-krzysztof.kozlowski@linaro.org


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