hwmon: (corsair-psu) various cleanups

Fix some typos, adjust documentation and comments to current state of
knowledge and update coding style to be more uniform.

Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/ZJWf3H972hGgLK-8@monster.localdomain


Signed-off-by: Guenter Roeck <linux@roeck-us.net>