arm64: dts: amlogic: gx: switch to the new PWM controller binding

arm64: dts: amlogic: gx: switch to the new PWM controller binding

Use the new PWM controller binding which now relies on passing all
clock inputs available on the SoC (instead of passing the "wanted"
clock input for a given board).

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20241227212514.1376682-4-martin.blumenstingl@googlemail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>