scsi: squash of multiple fixes for msm-4.4 kernel

This change is the squash of following commits from msm-4.4 kernel:

<36c183b7> ("scsi: Adjust DBD setting in mode sense for caching mode page per LLD")
<d2e7a77a> ("scsi: sd: reduce log level for suspend/resume log messages")
<c6b82e8b> ("scsi: Allow auto suspend override by low-level driver")
<edf4a84a> ("scsi: pm: fix null pointer access during sg_open")
<d8a84438> ("scsi: pm: fix deadlock condition")
<2b80aee4> ("scsi: pm: keep request queue and scsi device runtime status in sync")
<628aaf1b> ("scsi: reduce the informational log messages during initial probe")
<fe64842c> ("scsi: sd: remove check_events callback")
<2f82ca7b> ("scsi: pm: Remove use of CONFIG_PM_RUNTIME")

Change-Id: Ia8430f5c42dd66dbb044733eaa30d0ccd097b3c9
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
[cang@codeaurora.org: resolved trivial merge conflicts]
Signed-off-by: Can Guo <cang@codeaurora.org>