ARM: dts: amlogic: meson8b-ec100: add missing clocks property in sound card

ARM: dts: amlogic: meson8b-ec100: add missing clocks property in sound card

Since [1], sound card must have the corresponding clocks property,
add it to the EC100 DT, and fix:
meson8b-ec100.dtb: sound: 'anyOf' conditional failed, one must be fixed:
	'clocks' is a required property
	'#clock-cells' is a required property
	from schema $id: http://devicetree.org/schemas/clock/clock.yaml#

[1] ASoC: dt-bindings: amlogic,gx-sound-card: document clocks property
      commit: f189c972f86b00318cf2547b62e461cb98374e34

Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20240916-topic-amlogic-arm32-upstream-bindings-fixes-v2-10-0b20ed4f0571@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>