net-next/hinic:add shutdown callback

net-next/hinic:add shutdown callback

BugLink: https://bugs.launchpad.net/bugs/1820187
If there is no shutdown callback, our board will report pcie UNF errors
after restarting. This patch add shutdown callback for hinic.

Signed-off-by: Xue Chaojing <xuechaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 53fe3ed19df0bca6ce752fae8e483910b6f112f6)
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Acked-by: Kleber Souza <kleber.souza@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>