ASoC: dt-bindings: amlogic,gx-sound-card: drop minItems for audio-widgets

Like "audio-routing" drop the minItems: 2 from the "audio-widgets", because
any limit here - lower or upper- is rather meaningless.

This will also fix `dtbs_check` warnings like:
sound: audio-widgets: ['Speaker', '7J4-14 LEFT', 'Speaker', '7J4-11 RIGHT'] is too long

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20240605-topic-amlogic-upstream-bindings-fixes-audio-widgets-v1-1-65bd7cc2e09b@linaro.org


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