Use the new "dynamic sysfs callbacks", as introduced recently by Yani
Ioannou, in pc87360.

Note that this change isn't indiscriminate.  Only those attributes that
would benefit from having an index (i.e., those which are
macro-repeated) have been converted.

This significantly shrinks the size of the module:
  before:  49235  drivers/hwmon/pc87360.ko
  after:   32532  drivers/hwmon/pc87360.ko
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>