power: ip5xxx_power: Use regmap_field API

power: ip5xxx_power: Use regmap_field API

The IP53xx series [1] has a much different register
layout than the 51xx/52xx [2] currently supported
by this driver. To accommodate supporting the former,
refactor the code to use the flexible regmap_field API.

[1] https://sharvielectronics.com/wp-content/uploads/2021/07/IP5306-I2C-registers.pdf
[2] https://www.windworkshop.cn/wp-content/uploads/2022/04/IP5209-IP5109-IP5207-IP5108-I2C-registers.pdf

Signed-off-by: Csókás, Bence <csokas.bence@prolan.hu>
Link: https://lore.kernel.org/r/20241119180741.2237692-1-csokas.bence@prolan.hu
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>