scsi: smartpqi: fix LUN reset when fw bkgnd thread is hung

Add support for a timeout on LUN resets.

Link: https://lore.kernel.org/r/157048750055.11757.9689400788261610618.stgit@brunhilda


Reviewed-by: Scott Benesh <scott.benesh@microsemi.com>
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Murthy Bhat <Murthy.Bhat@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>