ARM: meson: Drop unused includes

of_platform.h is not needed, so drop it.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230717225623.3214384-1-robh@kernel.org


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