hisi_sas: Fix typo in setup_itct_v1_hw()

We were doing a arithmetic comparison instead of logical shift by
accident.  Mis-programming the itct did not seem to make a difference to
operation.

Fixes: abda97c2

 ("hisi_sas: Add dev_found")

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>