'additionalProperties' is now required by the meta-schema. Add it for
coda. As a result, 'interrupts', 'interrupt-names' and 'power-domains'
need to be reworked to be defined at the top level.

Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: linux-media@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20201117200752.4004368-1-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>