scsi: ufs: introduce setup_task_mgmt

Some UFS host controller may need to configure some things before any
task management request is issued

Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>