FROMGIT: scsi: core: sd: Add silence_suspend flag to suppress some PM messages

Kernel messages produced during runtime PM can cause a never-ending cycle
because user space utilities (e.g. journald or rsyslog) write the messages
back to storage, causing runtime resume, more messages, and so on.

Messages that tell of things that are expected to happen are arguably
unnecessary, so add a flag to suppress them. This flag is used by the UFS
driver.

Link: https://lore.kernel.org/r/20220228113652.970857-2-adrian.hunter@intel.com


Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
(cherry picked from commit af4edb1d50c6d1044cb34bc43621411b7ba2cffe git://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git

 for-next)
Change-Id: I8834c9d71618fd04635804779a41117629a75166
Signed-off-by: Bart Van Assche <bvanassche@google.com>