MFC r292218

MFC r292218

Don't retry SAS commands in response to protocol errors

  sys/dev/mpr/mpr_sas_lsi.c
  sys/dev/mps/mps_sas_lsi.c
        When mp[rs]sas_get_sata_identify returns
        MPI2_IOCSTATUS_SCSI_PROTOCOL_ERROR, don't bother retrying. Protocol
        errors aren't likely to be fixed by sleeping.

        Without this change, a system that generated may protocol errors due
        to signal integrity issues was taking more than an hour to boot, due
        to all the retries.

git-svn-id: svn://svn.freebsd.org/base/stable/10@293701 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f