regulator: dt bindings: add BD71847 device-tree binding documentation

Add ROHM BD71847 Power Management IC regulator binding information to
device-tree binding documents.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
1 file changed