scsi: hisi_sas: re-add the lldd_port_deformed()

scsi: hisi_sas: re-add the lldd_port_deformed()

BugLink: http://bugs.launchpad.net/bugs/1756094
In function sas_suspend_devices(), it requires callback lldd_port_deformed
callback to be implemented if lldd_port_deformed is implemented.

So add a stub for lldd_port_deformed.

Callback lldd_port_deformed was not required as the port deformation is done
elsewhere in the LLDD.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(backported from commit 336bd78bdabf39dbcee6b41f9628c6e51d1c25b0)
Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>