- set allow_restart option during scsi_device init.

   This allows the kernel to send a START/STOP Unit command to the drive if
   it encounters a 4/2 check condition in sense data.
Reviewed-by: NMurthy Bhat <murthy.bhat@microsemi.com>
Reviewed-by: NMahesh Rajashekhara <mahesh.rajashekhara@microsemi.com>
Reviewed-by: NKevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: NDave Carroll <david.carroll@microsemi.com>
Signed-off-by: NDon Brace <don.brace@microsemi.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>