XXXX Intel X540 support

*** 1076,1087 ****
  
          /*
           * The Insert Ethernet CRC (IFCS) bit and the checksum fields are only
           * valid in the first descriptor of the packet.
           * Setting paylen in every first_tbd for all parts.
!          * 82599 requires the packet length in paylen field with or without
!          * LSO and 82598 will ignore it in non-LSO mode.
           */
          ASSERT(first_tbd != NULL);
          first_tbd->read.cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS;
  
          switch (hw->mac.type) {
--- 1076,1087 ----
  
          /*
           * The Insert Ethernet CRC (IFCS) bit and the checksum fields are only
           * valid in the first descriptor of the packet.
           * Setting paylen in every first_tbd for all parts.
!          * 82599 and X540 require the packet length in paylen field with or
!          * without LSO and 82598 will ignore it in non-LSO mode.
           */
          ASSERT(first_tbd != NULL);
          first_tbd->read.cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS;
  
          switch (hw->mac.type) {
*** 1093,1102 ****
--- 1093,1103 ----
                              - ctx->l4_hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT;
                  }
                  break;
  
          case ixgbe_mac_82599EB:
+         case ixgbe_mac_X540:
                  if (ctx != NULL && ctx->lso_flag) {
                          first_tbd->read.cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
                          first_tbd->read.olinfo_status |=
                              (mbsize - ctx->mac_hdr_len - ctx->ip_hdr_len
                              - ctx->l4_hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT;