hwmon: (lm90) Create all sysfs groups in one call

Create all sysfs groups in one call by using sysfs_create_groups
instead of calling sysfs_create_group individually for each group.

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