nix_tx_vtag_free
nix_tx_vtag_free(rvu, blkaddr, pcifunc, index);
err = nix_tx_vtag_free(rvu, blkaddr, pcifunc, idx0);
err = nix_tx_vtag_free(rvu, blkaddr, pcifunc, idx1);
nix_tx_vtag_free(rvu, blkaddr, pcifunc, rsp->vtag0_idx);