[SCSI] stex: extend hard reset wait time

During hard bus reset of st_shasta controllers, 1 ms is not enough for
16-port controllers, although it's good for 8-port controllers.  Extend the
wait time to 100  ms to allow bus resets finish successfully.

Signed-off-by: Ed Lin <ed.lin@promise.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>