arm64: dts: amlogic: drop cooling-[min|max]-state from pwm-fan

Drop the invalid cooling-min-state & cooling-max-state from the
pwm-fan node defined in the bananapi dtsi and odroid-hc4 DT.

Link: https://lore.kernel.org/r/20230706-topic-amlogic-upstream-dt-fixes-take3-v1-3-63ed070eeab2@linaro.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>