hwmon: (w83627hf) push nr+1 offset into *_REG_FAN macros and simplify

patch changes 2 macros to incorporate the +1, and drops the +1 from all the
callers.  This also allows a 'reroll' of an expanded loop, and adjusting
indexes and loop limits on another.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>