HID: roccat: check cdev_add return value
HID: roccat: check cdev_add return value

Return value of cdev_add in hid_roccat.c init was not checked.

Signed-off-by: Michael Rissi <f29f1d53d0be2cb158cb0af342cb986957423fb9@dectris.com>
Signed-off-by: Jiri Kosina <ed58f755cc8caaf10c3e8c731a8b86fb8f13d6cb@suse.cz>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs