Revert "BACKPORT: FROMGIT: scsi: ufs: Optimize host lock on transfer requests send/compl paths"

This reverts commit 7613068f.

 Call trace:
  __switch_to+0x16c/0x2f8
  __schedule+0x4d0/0x94c
  schedule+0x80/0x100
  schedule_timeout+0x94/0x140
  io_schedule_timeout+0x48/0x70
  wait_for_common_io+0x80/0x108
  wait_for_completion_io_timeout+0x14/0x24
  blk_execute_rq+0xac/0x104
  __scsi_execute+0x104/0x1c8
  ufshcd_clear_ua_wlun+0x128/0x1cc
  ufshcd_err_handling_unprepare+0xd8/0x178
  ufshcd_err_handler+0x7d8/0x9d0
  process_one_work+0x218/0x634
  worker_thread+0x34c/0x588
  kthread+0x158/0x1b0
  ret_from_fork+0x10/0

Bug: 192095860
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: Ifaa166902daa9dbd340fab68987200c5bf3009d9