dt-bindings: add ADP5585/ADP5589 entries to trivial-devices

This change adds the device-tree entries for the Analog Devices ADP5585 and
ADP5589 devices to the trivial devices list.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20201127111420.96500-4-alexandru.ardelean@analog.com


Signed-off-by: Rob Herring <robh@kernel.org>