hwmon: w83627hf: Reorder symbols to get rid of a few forward declarations

Declarations for static symbols are useless code repetition (unless
there are cyclic dependencies).

Reorder some functions and variables which allows to get rid of 7
forward declarations.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220926153946.1478260-1-u.kleine-koenig@pengutronix.deSigned-off-by: Guenter Roeck <linux@roeck-us.net>