regulator: fan53555: Make use of the bit macros

For consistency and improved clarity, use BIT() and GENMASK() macros for
defining the bitfields inside the registers. No functional changes
intended.

While here, also fix DIE_{ID,REV} inconsistent indentation.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20230406194158.963352-6-cristian.ciocaltea@collabora.com


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