Revert "scsi: ufs: fix exception event handling"

This reverts commit 62413bac.

This is a preparaion change for android-4.9.117 merge into msm-4.9.

Delta added by reverted change was already applied and further
modified. Here is the trace:

  [msm-4.9] cce6fbcb ufs: snapshot of UFS driver
  [msm-4.4] ^--33ec44f cfg80211: Advertise extended capabilities per interface type to userspace
               00d5062 scsi: ufs: add reference counting for scsi block requests
               2ab0dfa scsi: ufs: fix exception event handling

Change-Id: Ieb87b4d47e3f8d83122688e85112d8d9ef67e5eb
Signed-off-by: Blagovest Kolenichev <bkolenichev@codeaurora.org>