8624 xhci and nvme can't bind DMA memory with IOMMU enabled
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

*** 2169,2179 ****
           * "ridiculous large limit".  This saves some extra checks on
           * hot paths.
           */
          if ((sinfo->si_copybuf_req == 0) &&
              (sinfo->si_sgl_size <= (unsigned)attr->dma_attr_sgllen) &&
!             (dmao->dmao_size < dma->dp_maxxfer)) {
  fast:
                  /*
                   * If the driver supports FMA, insert the handle in the FMA DMA
                   * handle cache.
                   */
--- 2169,2179 ----
           * "ridiculous large limit".  This saves some extra checks on
           * hot paths.
           */
          if ((sinfo->si_copybuf_req == 0) &&
              (sinfo->si_sgl_size <= (unsigned)attr->dma_attr_sgllen) &&
!             (dmao->dmao_size <= dma->dp_maxxfer)) {
  fast:
                  /*
                   * If the driver supports FMA, insert the handle in the FMA DMA
                   * handle cache.
                   */