regulator: mp8859: Validate and log device identifier information

Ensure that we are talking to a device which reports the expected ID
register information and log the OTP and revision information for
diagnostic purposes.

Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/r/20240225-regulator-mp8859-v1-2-68ee2c839ded@kernel.org


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