XXXX Nexenta fixes for mpt_sas(7d)

*** 280,290 ****
          (void) ddi_dma_sync(mpt->m_dma_req_frame_hdl, 0, 0,
              DDI_DMA_SYNC_FORDEV);
          request_desc_low = (cmd->cmd_slot << 16) +
              MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
          cmd->cmd_rfm = NULL;
-         mpt->m_active->m_slot[cmd->cmd_slot] = cmd;
          MPTSAS_START_CMD(mpt, request_desc_low, 0);
          if ((mptsas_check_dma_handle(mpt->m_dma_req_frame_hdl) !=
              DDI_SUCCESS) ||
              (mptsas_check_acc_handle(mpt->m_acc_req_frame_hdl) !=
              DDI_SUCCESS)) {
--- 280,289 ----
*** 1322,1332 ****
          (void) ddi_dma_sync(mpt->m_dma_req_frame_hdl, 0, 0,
              DDI_DMA_SYNC_FORDEV);
          request_desc_low = (cmd->cmd_slot << 16) +
              MPI2_REQ_DESCRIPT_FLAGS_DEFAULT_TYPE;
          cmd->cmd_rfm = NULL;
-         mpt->m_active->m_slot[cmd->cmd_slot] = cmd;
          MPTSAS_START_CMD(mpt, request_desc_low, 0);
  
          rvalue = 0;
          (void) cv_reltimedwait(&mpt->m_fw_cv, &mpt->m_mutex,
              drv_usectohz(60 * MICROSEC), TR_CLOCK_TICK);
--- 1321,1330 ----