backports: handle hwmon_device_register_with_groups API calls

backports: handle hwmon_device_register_with_groups API calls

The new hwmon_device_register_with_groups API has not been backported yet.
Address this by putting ifdef around the code using the API.

commit 74188cba088192e14cd7fd5433876e8c947bcdd8
Author: Guenter Roeck <linux@roeck-us.net>
Date:   Thu Jul 11 20:00:12 2013 -0700

    hwmon: Provide managed hwmon registration

git describe --contains 74188cba088192e14cd7fd5433876e8c947bcdd8
v3.13-rc1~126^2~30

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>