MAINTAINERS: Add ADMAC driver under ARM/APPLE MACHINE

Register the driver source and binding schema.

Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220531213615.7822-4-povik+lin@cutebit.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>