dt-bindings: regulator: Convert anatop regulator to json-schema

Convert the anatop regulator binding to DT schema format using json-schema.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1590717551-20772-1-git-send-email-Anson.Huang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>