FROMGIT: arm64: dts: amlogic: meson-g12-common: Set the rates of the clocks for the NPU

Otherwise they are left at 24MHz and the NPU runs very slowly.

Signed-off-by: Tomeu Vizoso <tomeu@tomeuvizoso.net>
Suggested-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>