euler inclusion
category: bugfix
bugzilla: 5457
CVE: NA

Sometimes the sata domain device cannot be probed so we'd better check the
expander phy's linkrate to see if it is greater than the pathway.
Signed-off-by: NJason Yan <yanaijie@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>