HID: roccat: convert class code to use dev_groups

The dev_attrs field of struct class is going away soon, dev_groups
should be used instead.  This converts the roccat class code to use the
correct field.

Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/hid/hid-roccat-arvo.c
Simple merge

diff --cc drivers/hid/hid-roccat-isku.c
Simple merge

diff --cc drivers/hid/hid-roccat-kone.c
Simple merge

diff --cc drivers/hid/hid-roccat-koneplus.c
Simple merge

diff --cc drivers/hid/hid-roccat-kovaplus.c
Simple merge

diff --cc drivers/hid/hid-roccat-pyra.c
Simple merge