We are returning -EINVAL instead of the error returned from kobject_move() when
it fails. Propagate the actual error number.

Also add a meaningful print when sysfs_create_link() fails.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>