Allwinner H3 SoC also contains MBUS controller.

Add compatible for it.
Acked-by: NMaxime Ripard <mripard@kernel.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: NMaxime Ripard <maxime@cerno.tech>