hwmon: (nct6775) Add blank lines after declarations

checkpatch complains about
	WARNING: Missing a blank line after declarations

Add missing blank lines. Also reorder variables length-wise where appropriate
if a function header is touched anyway.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>